Katsumi Kajio (梶尾克美 Kajio Katsumi) is a character in Ultraman Gaia. He is the leader of Team Lightning.


Kajio has high pride and absolute confidence in the handling, but he had a fairly high elitism first time around. Kajio never amused when Gamu joins XIG due to him being a student. Kaijo surprisingly terrible at socializing. Due to this, he always went away from everyone, though there was little able to converse with others on a mission other than the initial. He develops a relationship with Atsuko's sister, Ritsuko.


Little of Kajio's pre-XIG experience is revealed throughout the story, besides that he used to be an elite of the Defense Force.


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