Backstory

Leo of Oxenfurt
 
Born into a wealthy family but parents sold him to the school of the cat. His parents favored his brother more and despised Leo.
Mutations failed. Leo’s emotions remained even after cat school’s training. One man made sure Leo stayed "sane."
 
Leo was taught to fight without armor in the school of the cat. Has a habit to walk around shirtless.
 
The school of the cat training made Leo into a fine swordsman but left him traumatized somewhat nervous. Not just for people, but everything around.
Training, without armor, included being attacked while meditating a lot by teachers.
 
Note: Was hugely bullied and abused because mutation failure and potion allergy
 
He helped a mage once known as Schylar of Geso with his "experiments." Didn't get paid, but later these mutations made potion allergies go away.
Mage promised to help him if further mutations happen and cause harm.
 
Became a lone traveler. Only doing work to put food on the table. Worked for a noble man as a bodyguard for a while. Paid well. Strays from the path now and then.
 
Got money and stayed away from the path for a while until he met another Witcher, Vogel of Malheur, and became friends with him.
 
Godling hunt. Didn't kill the creature. Spared and took it to the employer. Employer didn't pay and Godling escaped. Was tricked and framed by the same Godling from robbing the employer. Leo hates Godlings. Employer is still hunting Leo.

Leo was ordered to hunt a succubus. "Easy fight” to capture said creature. Left a scar on the eye as a reminder not to, literally and figuratively, fuck with these creatures.
 
Did a few jobs here and there. Met Mosa and Luna.