You name it.
If you want to be cerebral, try Ignotus or Calypso. If you want to be silly, go with Boxy or Adleiavde.
Conundrum
Mystery Cat
Steve.
Pawn
Cataclysm
Boxed in. Unenlightened. Trapped. Paradox.
Dingle or Dingy.
https://www.youtube.com/watch?v=ZSdeCfCZkqY
Schrodinger’s Cat and the Raiders of the Lost Quark on Xbox One 8,126 views•May 12, 2015
Sneaky Pussy
^^Ooh – like that!
Zombie
Casper.
Clawstrophobe
Entanglement
Schrodder
Crip
C4
Astray
EPR2
Fritz
Catalysis
Menow
Scratch
Catstate
Perdition
8½ Lives
Gemini – twins, one dead and one alive
Hello Kitty Loli Lunch Kitty Fritter Jack (in the box)