042 Cosmo

Cosmo is the TDD astronaut (or cosmonaut).

The terms are synonymous.  Cosmonaut is just the Russian term for what Americans call an astronaut.

Cosmo has many versions, G1-G4.

He also has a derpy little alien zood named Melvin.   

I am not sure how the name originates.  But, the zood came out in 2005.  In the same year, the Disney movie version of  Chicken Little came out.  This movie features a little alien named Melvin.  The style of the alien is drastically different, but still worth a mention.

More likely, Melvin is just a take on Marvin the Martian.  This famous Warner Brothers characters goes back to 1948.  Marvin is always trying to destroy the Earth (because it disrupts his view of Venus), but is always outsmarted by Bugs Bunny.  Melvin doesn't look like Marvin, but the name is close enough to suggest that Tech Deck brand of humor.