Some people, both here and at M/M, have said they have a hard time remember which character had which D&D name, so here's the who's who (along with Race and Class, for those in the know. Unless specified in the episode Advanced Dungeons and Dragons, I decided on the race and class myself, based on the characters themselves. their personalities and what I think the would choose the be)

Jeff - Marrrrr (Human Rogue)

Annie - Hector the Well Endowed (Half-Elf Alchemist)

Shirley - Zippity Do (Dwarf Cleric)

Pierce Hawthorne - Pierce (Human Fighter)

Troy - Bing Bong (Elven Ranger)

Britta - Lavernica (Half-Elf Druid) And her small panther companion, Gloria Steinem

They also sometimes travel with a half-orc named Morg, who's a non-player character, which basically means he's Abed.