Answer: Spend 15 minutes on the assignment.

Remember that you have three other character assignments later in the month: an antagonist, and two minor characters. If I were you, I would evaluate how many characters I want to profile by the end of the month, including minor characters, and if I have minor characters in addition to my extra protagonists, I'd go ahead and profile all my protagonists now. Or if it turned out that I don't really have strong minor characters, then I might save my extra protagonists for the minor character assignments.

....but I'm not you, so you have to do whatever YOU would do, so long as you (1) profile your protagonist, and (2) spend fifteen minutes on it.

I'm not sure if that helped you decide or made it worse.

Cheers,
Michelle