Thuban
Thuban was a blue-skinned alien humanoid from one of the universes where the Infinity Apartment existed, and a neighbour of Jenny Everywhere's as a result. Aware of the Apartment's multi-dimensional nature, he was a friend and occasional adventuring companion to Jenny.
Aware of goings-on in the human-inhabited universes to which the Apartment connected, Thuban once attempted to tell the entire Star Wars saga in six panels of the comic in honour of Star Wars Shortened, but failed because he wasted too much of the strip discussing the idea itself, such that he had to boil everything down to a single panel of a severed hand letting go of a lightsabre, with the caption “Stuff happened”.
When Jenny decided to take him, Ezri and Keith to Club Jitsu, a ninja club, Thuban took in stride the fact, as a ninja club, most of the guests were remaining invisible or otherwise undetectable, simply marveling at the way his glass kept refilling itself whenever he blinked. After a few ninjas became visible after all, he flirted with one, demonstrating the ability to speak Japanese. (COMIC: Infinity Apartment)
