タマ

A cat suit that appears in both 428: Shibuya Scramble and Time Travelers. In both games, the suit is inhabited by an unidentified female character.

In 428: Shibuya Scramble:
Tama, a person of unknown identity, is working inside a cat suit as a by-the-day temp worker for Yanagishita in order to buy a special necklace she found at a general store. She begins her work of promoting a diet drink, "Burning Hammer."

Her true identity is revealed to be Maria Osawa, Hitomi's twin sister and Kenji Osawa's daughter.

The Tama mascot also appear as:
—One of Sasayama's disguises in a Bad Ending, where it's revealed that the costume is a CATS (Costume As Transmission System), a robotic suit capable of dimensional travel.
—Several guides within the Labyrinth that lead Minorikawa through it.

In Time Travelers:
A mysterious woman who appears in the story wearing a cat costume. Her identity is a mystery.
Tama's real identity is an iteration of Mikoto Shindou, from one of her many time loops in the story.