『Alex Tachibana』

Colleague of Umaru's brother, Taihei Doma, and the elder brother of Tachibana Sylphinford. He also has relatives in Europe, as early on in the series he made a gift of a nodding cat figurine to Taihei Doma from that continent. He is mentioned to show an interest in anime and gaming, and is implied to have interested his younger sister in the two as a result.