Nataku Son

is a child from Tokyo, who was turned into a Flame Human by Rekka Hoshimiya, using artificial means.

Appearance
Takkun 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, Takkun 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, Takkun was confronted by Tamaki Kotatsu in the streets and was carried off to an abandoned warehouse. Told that there was a way for children to be immune to the phenomenon, he followed. At the arrival, Takkun was frightened to see Rekka turn another human into a Flame Human via artificial means, and while trying to stop him from doing so, was bitten by the Bug, and began transformation into a Flame Human.