He is a cat called "Nyaossan" because he looks like an old man. He's always tending to people's unreasonable demands. He gets back pain from walking on two legs wearing his trademark belly band. He loves drinking catnip drinks.

The manager of the "I-kafe" on the ground floor of Nyandemo 21. He bosses Nyaossan about even though he's really customer. He's a determined and spirited character and is scary if he gets angry. He loves fake lashes. His gender might be male but in his heart, he's a girl!

The same age as Nyaossan, the pair have been eternal rivals since their school days. He unexpectedly fell into part-time work at Nyandemo 21. He's easy to get on with and can be shrewd, though he doesn't show it.

The president of Nyandemo 21 and Nyaossan's boss. He happily agrees to unreasonable jobs and burdens his employees. He specializes in excessive demands. Has blond hair.

A water sprite who appeared when Nyaossan was saving a spot for cherry blossom viewing. He kindly applied poultice to Nyaossan's back to ease the pain. Nyaossan thinks to himself, “I guess we’ll never meet again...”