Mielikki

the neutral good goddess of forests and forest creatures (particularly dryads) and the patron of druids and rangers in the Faerûnian and Finnish pantheons. The Lady of the Forest was also the goddess of autumn for a time, but Myrkul reclaimed that domain after his return during the Second Sundering. Scholars of other lands proposed she was known as Khelliara, the Forest Maiden, in Rashemen, and she had a half-elven aspect known as Khalreshaar on the isle of Evermeet.
Mielikki was cheerful with a ready smile and had confidence in herself and her path. However, while she fully showed that confidence when in small groups, she was averse to formal speaking and being in charge of larger groups. She did not consider people her friends lightly, but she demonstrated fierce loyalty and protectiveness to those she did. Her views tended to be those of the archetypal ranger. Yet, in the late 15th century DR, mortals saw her as distant and spiritual, and not as human as some other gods. While not uncaring of mortals, her attention and blessings could be harder to attract. While she knew that death was a part of life and some must die so that others may live, she could not just accept injuries and deaths of both animals and friends. She regularly healed such stricken beings as she found them, rather than leave them to be part of the circle of life as Silvanus would.
Mielikki's preferred avatar was the Supreme Ranger, where she appeared as a tall woman of robust and shapely build and lithe grace. She moved with the spring of a leaping buck and the ease of a prowling panther. Her russet-colored hair was long and unbound so it hung around her shoulders and down her back, while her eyes were large and brown, and deep like pools. Her clothes were dull green and brown in color and she wore the leather armor commonly used by rangers. Her other avatar was the Forest Queen, seeming to be a young maiden who had golden-hued moss and leaves for hair. She wore sheer yellow and green gossamer robes, even in chill winter weather, and had summer songbirds fluttering around her person. No matter her chosen form, Mielikki was 10 feet (3 meters) tall, spoke in a rich low purr, and always walked on the air so her feet never made contact with ground, and thus didn't leave any tracks and didn't make any sound. Occasionally, she had a stag's antlers emerging from her forehead, either already present when she appeared or growing slowly as mortals watched, though she displayed these less often after Beshaba adopted black antlers as her symbol, and had almost abandoned it by 1372 DR.
Mielikki was a supremely talented tracker, better than Malar and surpassed perhaps only by Gwaeron Windstrom. As a master ranger and druid, she was skilled in all aspects of survival, hunting, wilderness lore, and more, and she was particularly skilled in bowmaking. Her greatest favored enemies were undead, shapechangers, and dragons, followed by giants and animals. She was instantly alerted to any action that was despoiling a forest or threatened to do so. Mielikki could cast spells from any school of magic bar those of necromancy and illusion and from any sphere bar the reversed, harmful forms of spells in the healing sphere and necromantic sphere. She was herself immune to necromancy spells and reversed, harmful forms of healing and necromantic sphere spells, and her very touch destroyed undead. Moreover, she cast all spells from the animal sphere and plant sphere that involved of course animals and plants at twice their normal power in all aspects and they were harder to resist. She cast spells as a druid and commanded all the spells and powers of the Animal, Good, Plant, and Travel domains. 
In particular, simply by touching any tree, Mielikki could create treants at will and she could summon twelve forest creatures of one type to her side every two minutes, and they obeyed their goddess unto death. She could summon great packs of wolves or flocks of hawks or up to a dozen or so unicorns; command plant creatures up to 13 miles (21 kilometers) away; and speak to animals and cause them to grow in size or become intelligent, or else fall asleep. No woodland creature could harm her, even those controlled by others. Mielikki's very presence cancelled all mind-altering effects, such as charms and psionics, on all good and non-evil creatures up to 20 to 30 yards (18 to 27 meters) from her person. In addition, she had the psionic defense intellect fortress.
In combat, Mielikki was skilled in fighting with twin scimitars—her hornblades—and in archery. However, she did not engage in melee often, and favored her fists when she did. She would rather rely on her own skills and magic. She also sometimes used a bow, but its arrows struck not to inflict injury but to bring life—where they landed, forest plants appeared and grew in a matter of moments, even entangling whoever she wished.
When in battle, Mielikki sometimes fought with her two scimitar-sized hornblades, known as the Hornblades, which she sometimes lent to mortal rangers who embarked on great quests on her behalf. She also had her longbow, named Hartsong.
Mielikki had long dwelled upon the Prime Material plane itself, and though the precise location was unknown to others, she made her home in a hidden grove near the headwaters of the Unicorn Run. She only established a divine realm in the Outer Planes in the Year of the Gauntlet, 1369 DR. It's likely she helped Eldath move out there too. After that, she resided in the Grove of the Unicorns, which in the Great Wheel cosmology was found in Krigala, topmost layer of the Beastlands, and in the World Tree cosmology was located within the House of Nature.
Following the Spellplague, by the late 15th century DR, Mielikki resided with Silvanus in his domain in the Deep Wilds in the World Axis cosmology.
Mielikki was a servant of Silvanus, the Oak-Father, together with Chauntea, the Grain Goddess, and Eldath, the Goddess of Singing Water. Mielikki, Eldath, and Silvanus counted each other as allies, worked in harmony, and held true trust and affection for one another, and these relationships were mirrored in the alliances of their churches and priests. Mielikki's calmness tended to ease Silvanus's rage at those who harmed nature. Although her followers sometimes referred to her with the honorific Daughter to Silvanus, Mielikki was not actually the daughter of Silvanus; rather, she considered him a father figure. This led to some confusion and a false myth told that Mielikki was the outcome of an affair between Silvanus and Hanali Celanil, an elven goddess of love. Particular proponents of this were the half-elf followers of her Khalreshaar aspect. Similarly, she thought of Eldath like a sister. So close was their relationship that she gave her fellow goddess the nickname 'Datha' and they had been seen to hug one another like sisters. Despite these bonds, Mielikki followed her own path.
While she served Silvanus, she in turn was served by Gwaeron Windstrom, Lurue, and Shiallia. Gwaeron served as Mielikki's messenger to the elven, gnomish, and halfling pantheons when she needed a favor, owing to his good relations with them. He also served as her intermediary with mortals, usually rangers, in the North when direct speech was required, for which he was titled the Mouth of Mielikki. When mortals prayed to her through him, he tracked her down to whichever forest she was concealed in and delivered the message. On some of her expeditions, Gwaeron accompanied Mielikki to lend her aid in tracking and in training her own rangers. When pressed into battle, which was rare, Mielikki rode upon the back of Lurue the Unicorn, who was a friend and ally. Because of this close association and Mielikki's own unicorn symbol, some mortals confused the two. Lastly, Shiallia lent her services in planting seeds and nurturing seedling in the High Forest and in midwifing for pregnant forest animals. After the Spellplague, Shiallia was counted as Mielikki's exarch.
Mielikki was also allies with Shaundakul, Lathander, and Nobanion, and was of course an enemy of Malar, Moander, Myrkul, Talona, and Talos. Talos and Malar particularly hated Mielikki's dream for the Delimbiyr Crescent, and often had their cults bring destruction and bloodshed to her land and her people thee. Among the non-human gods, she was an ally of Marthammor Duin of the dwarven pantheon; Angharradh (who took a motherly interest in her), Corellon Larethian, Rillifane Rallathil, and Solonor Thelandira (they were known to be romantically linked) of the elven pantheon; Baervan Wildwanderer of the gnome pantheon; and Sheela Peryroyl of the halfling pantheon. As Khalreshaar, she was believed to serve Rillifane Rallathil. She was counted among the so-called Gentle Sisters and as part of the Sacred Hexad. Further afield, Mielikki was on good terms with the Oerth deity Ehlonna. The two woodland goddesses got together often to catch up, relax, and drink oakroot tea. Though Ehlonna had no presence on Toril, Mielikki answered prayers on her behalf for any of Ehlonna's followers who happened to arrive there. The two goddesses even shared a divine realm, the Grove of the Unicorns.
Moreover, Mielikki had two mortal champions. One, in the late 14th century DR, was Lady Jeryth Phaulkon of Waterdeep, titled the Chosen Star of Mielikki, Our Lady's Champion, and even the Granddaughter of Silvanus. To be her chosen, the goddess granted her certain powers to make her a steadfast forest warrior. She charged Jeryth with defending the High Forest on her behalf. But a more long-standing champion was the Green Regent, a chosen of Mielikki entrusted with defending the Delimbiyr Vale and her dream for it. Over centuries, every four years, this role was passed from person to person, each one chosen by Mielikki according to her current needs. In a special rite in Loudwater conducted by the Circle of the Stag, she picked all kinds of people, and often not the most likely, but always proving to be right for the role and for her plans. The Green Regents were supported by their Scions, the remaining candidates picked by the goddess. She communicated with the Green Regents through dreams. On the planes, her proxies were Tiera and Lemminkainen. 
Mielikki's worshipers were concentrated in the northern parts of Faerûn, namely in the Delimbiyr Crescent and Loudwater, High Forest, the North, the Silver Marches, and in the city of Silverymoon; in the Dalelands, particularly Archendale, Daggerdale, Harrowdale, and Shadowdale; and in Cormanthor, as in Elventree. In the east, they could be found in Rashemen, Aglarond, and the Great Dale, and in the south as far as the Chondalwood. She was among the major non-elven deities venerated in Myth Drannor in Cormanthyr before its fall. In these places, she was venerated by woodsmen among the humans, elves (especially wood elves), and half-elves, as well as by dryads, hamadryads, and treants, and by forest creatures with no common gods of their own. Common folk appealed to her when children were lost in the forest, so she might protect and guide them. Woodcutters left simple shrines to her in thanks for their safety and for the wood they'd taken, and such shrines marked the limits of future hunting and logging. Otherwise, the Lady of the Forest was little talked about, except in peaceful woodland settings.
The majority of rangers revered Mielikki, as their leader, their watchful mother, and the supreme ranger. They were among her most fervent followers. Yet many of the rangers of the North prayed to Gwaeron Windstrom instead, worrying that Mielikki was too divine, wild, primal, and mysterious to be beseeched directly, while Gwaeron at least was once a mortal ranger like them. Among adventurers, Mielikki was followed by rangers of all temperaments, by druids, and by clerics and thieves of good or chaotic bent. Many Harpers also followed Mielikki, as did most members of the Emerald Enclave.
Under her Khalreshaar aspect on Evermeet, she was mainly worshiped by a growing cult of half-elves. They believed her to be the daughter of Silvanus and Hanali Celanil, and as such, the first truly half-elven deity.