Фелікс Робейн

Felix Robane is a side character in the manhwa "Who Made Me a Princess", and serves as the main protagonist's personal guard. He is first seen in chapter six when Claude de Alger Obelia first meets Athanasia de Alger Obelia. He is assigned the role of Athanasia's personal guard when she is 5, and soon becomes quite close with her.

Felix's mother was Claude's nanny, and the two were raised as bosom brothers.

(Source: Who Made Me Princess Wikia)