pony fritz.. His mlp au name would be caligo crescent.
caligo, like his main universe counterpart, is an umbrum, but taken shape in the form of a unicorn instead of a batpony. However, caligo is a native of the reflections universe, where good king sombra resides. he sought the return of his king, taking care of an artifact left behind by him - the reflections universe alicorn amulet. before the redemption of reflections celestia and luna, sombra employed him as a spy to find ways to infiltrate and eventually rehabilitate the two princesses.
caligo / fritz is very stoic and appears emotionless. he has a heart of stone and struggles to make meaningful connections to others. he is meticulous and blunt, but is very loyal to anyone who has earned his trust.