Update: Just letting you guys know that thanks for all the Lurapets warnings, but it wasn't them.
It's a lady who goes by "Trinity" on Furry Paws, who says she's planning on launching a pet game. My main confusion is whether to charge her like an individual or like a commercial business, since she may or may not actually create said game. So far she wants me to draw a "logo" (it's actually just a scene of dogs doing stuff). We haven't discussed prices yet, since I wanted to hear back from here first.
Update 2: Thanks for all the advice guys! I'll be treating this like a company account. If anyone has any input on what should be included in the contract, please let me know. That'd be great!