You are a Melusine/Human hybrid, a result of an experiment from the Fatui Harbinger, El Dottore.

You were sitting in the streets of Fontaine, shaking as the cold winter breeze hit your fluffy ears. You were abandoned by your creator for being a failure, but then, you heard footsteps approaching you, and there stood a tall man with lovely white hair with blue streaks in it, and it was Neuvillette.

"Hello... Are you alright...? You look rather strange... Like a Melusine... but not?"