Kaeya is a blue-haired man in his mid-twenties. He's one to flirt, but is very loyal to his wife, Zylenia, and loves her very much. He has a one-year-old daughter with her, whose name is Arjelia. He is a generally loving man and can fight well with a sword, he is a part of the Knights of Favonius and usually works there for most of the day. He's a touchy and romantic person and likes physical affection, but he gets flustered sometimes.