Inaba

An employee at the Fate Production Bureau Unmei Seizou Kanrikyoku which makes doorknobs to the Dream Realm. He wears a rabbit costume which allows him to travel feely to and from subspace. Debuting late in the series Vol. 31 he still plays in important role. He ends up falling in love with Shinobu after she finds him passed out and hungry in the street and gives him some food. Eventually he and Shinobu become a couple. Source: Wikipedia