"I have to be able to do this!"
Tenma wear a long green kimono with a brown bowl hair cut.
Tenma is shown to be a shy little boy but when danger comes, he will summon his familiar to fight for others. Tenma come up as rude to people but lighten up when he befriended Jinbei. Tenma had shown fear of bugs due to his past but starting to let go of his fear.
His fear of bugs began during his childhood, when he went to a tree to eat some fruits. After picking the fruit, Tenma was scared by the fact that it was infested with bugs. This traumatic experience started his fear of bugs.
Tenma is an onmyoji, capable of summoning two powerful shikigami familiars contained in paper dolls that can enlarge themselves to giant size and deal powerful blows. Tenma is able to fuse both of his shikigami to form an even powerful version of it self that can push someone to outer space.
His lack of physical strength is made up for by his powerful shikigami.