One of the unlockable pets from the puzzle game Insaniquarium. She can bring dead fish back to life and is possibly a literal angel.
Angie the Angelfish
Angelcore
for Angelcore in Fictional Characters as Aestethics
Suggested by xylopiano
I will not repeat myself twice, if you want to add an aesthetic, search on "Aestethic Wiki", please. Have a nice day!