this is an AU where Kaeya corrupted and became an abyss prince after betraying Diluc since no one would forgive him. He's evil and has killed countless but has a soft spot for children and animals as it reminds him of himself when his nation was in war and was destroyed. Diluc hated him after the betrayal so Kaeya couldnt take it anymore and left,resorting to the abyss. He has his cryo vision and is quite skilled with swords.