More innocent than his brother, he is uneasy at the thought of performing any morally ambiguous deeds. He is assigned to obtain Oginome Ringo's diary, assuming that it is the Penguindrum, and hesitates after being told to obtain it by any means necessary. As he accompanies Ringo in her stalking activities, the two of them develop a strange closeness. He tries to play the role of Ringo's conscience many times, but like his siblings, he harbors a deep guilt for the massacre caused by their parents. He feels that Ringo should despise him and pushes her away after the diary is lost.

Spoiler

Shouma is the one that saves the abandoned Himari from the Child Broiler, choosing her as a soulmate and bringing her into the Takakura family, of which he is the only original member of the whole supposed Takakura family.