Zarrus

The only Medusan in Starfleet, Ensign Zarrus (Zee, informally) is the Phoenix computer specialist. Medusans are noncorporeal life forms, whose minds are called “the most beautiful in the Federation,” though their appearance is so hideous that one look at a Medusan by a humanoid life form will cause total madness in that human unless the human is wearing a specially designed protective visor. Zee can exist outside her quarters via a specially designed container, which is equipped with antigravs and mechanical limbs she can use to manually interface with control consoles and use devices like tricorders and tools.