Nyanusofu

Nyanusofu (formerly known as Nyanus) is an ornery old cat with a strict adherence to authority, which he expects all students to equally obey. His construction is seemingly inexplicable, far too advanced of a machine to have existed decades ago, yet now showing age through his decaying body and memory. He firmly believes in the scientific method and that the experiment’s means are justified by its ends, but with his overseer role usurped, Nyanusofu is a relic lacking any purpose.

[From official site]