橄榄石 Peridot

Unofficial Peridot fan-art companion with orbiting metal cubes, an impatient rotating tablet and a carefully straightened miniature tower.

Rin Chibi

An original chibi mage-girl Codex pet inspired by Rin Tohsaka, with black twin tails, red accents, and playful magic poses.

葬仪屋 Undertaker

Unofficial Undertaker fan-art companion from Black Butler, featuring a sleeve-hidden cookie trick, a quiet chuckle, and careful brass-key inspection across nine original animations.

Nami

A cute chibi pixel-art navigator Codex pet with orange hair, a nautical outfit, and playful weather-map energy.

Mikuo

Unofficial fan-art companion inspired by Mikuo, with short teal hair, a headset and teal-trimmed stage attire.

GNU角马 GNU

Unofficial GNU Project mascot fan-art companion inspired by Etienne Suvasa’s A GNU Head. The warm-gray four-hoof body and scroll, leaf-balancing and gear-inspection animations are original desktop adaptations of a head-o

苔背龟 Turtle Mossback

An original moss-backed turtle who slowly peeks out of its shell, offers a tiny forefoot greeting and stretches to inspect its little rooftop garden.

Keigo Atobe

A chibi Keigo Atobe-style tennis Codex pet.