Tabitha

Tabitha (aka She-Prime) was the online girlfriend of Gimpy (aka "G-Prime") voiced by Sunday Muse in the episode Roommates.

They appear to be unaware they are actually next-door neighbors in the same dormitory throughout the entire length of their relationship.

Etymology
Her online alias appears to be derived from Gimpy's.

The name "Tabitha" never actually appears in the episode and is only revealed in the episode guide on the official website.