Sironus Animago
Sironus Animago was a 19th century English wizard that specialized in the study of animal transmogrification.
Personality
He is said to have been a recluse with a strong distaste for humanity, to the point that he spent half his life trying to turn himself into other creatures.
History
Sironus was a wizard who lived in the 19th century, and wrote a spellbook containing all of his knowledge near the end of his life. He considered it so dangerous that he bound a basilisk into guarding it after he passed.
Relationships
Lacie
Lacie is the basilisk he bound to his spellbook, and hates it (and him) with a passion. They never knew each other, as Sironus died shortly after her hatching, but she finds his spells incredibly unreliable and poorly made, frustrating her more that she’s bound to it.
References
ToothPasteCanyon (DannyFenton123) “We Walk Like Humans Do” [Archive of Our Own] https://archiveofourown.org/works/19802773/chapters/46885618