Nataku Son

is a child of Tokyo, who is a Third Generation.

Appearance
Tatsu is a young child with light-blonde, short wavy hair and small black eyes. He dons a light a v-neck sweater, a black shirt, black trousers and black shoes.

Personality
Alike any other usual child, Tatsu was a straight-forward and kind individual. He showed bravery and willingness to stop Rekka from turning innocent people into Flame Humans.

VS. 1st Special Fire Brigade arc
While walking with his friend, Tatsu was confronted by Tamaki Kotatsu in the streets and was carried off to an abandoned warehouse, being told that there was a way for children to be immune to the phenomenon, he followed. At the arrival, Tatsu was frightened to see Rekka Hoshimiya turn someone into a Flame Human, and while trying to stop him from doing so, was bitten by the Bug, and began transformation into a Flame Human. However, Tatsu seemed to be compatible with the flames and did not transform into a Flame Human.