Eikichirō Saidō

is an anime-only Shinigami.

Synopsis
He was sent to find Rukia Kuchiki in Karakura Town. Two years Rukia's senior, he seems to be a low or mid-level Shinigami (supported by the fact he is never seen activating his Zanpakutō), and Rukia states that she has never seen him before. He was in service with the Onmitsukidō, and finds himself pressed into service assisting Rukia and Ichigo against the Hollow, Grand Fisher. After being wounded by Grand Fisher, he fell asleep. He was seen much later in the series during the Fake Karakura Arc after a group of hollows chasing the soul of a young girl are destroyed due to the sheer reiatsu of the shinigami and Espada noting on the beginning of the battle but also wondering who will win.

Personality
Saidō also seems to be a bit lecherous due to commenting on how he had a clear view of a soul's panties in the Fake Karakura Arc, however he also seems to be quite level headed and kind.