Spaceship Tet (InstanceTopic, 9)

From Compile Worlds

Teto, or possibly just Tet, is the name of a spaceship that appears in Puyo Puyo Tetris. Presumably, the characters T, S, I and O are minding their own business on board their ship when the Puyo characters magically and accidentally teleport there, scaring the crap out of them and making the two groups of characters naturally antagonistic towards each other. It is also rumored that an L or J is the boss of the ship to complete the set of thematically named characters.

Etymology

The name as it appears in Japanese involves the kanji 号 (ごう　gou), though there is no evidence to suggest that 号 means "spaceship". However, 号 can be used to refer to the name of a vehicle, and the thing being referred to is definitely a spaceship as seen in the Puyo Puyo Tetris stage select screen.