My warlock character is in love with herself. Really, she would make Deadpool think she is too narcisistic.
She took the Inspiring Leader feat, but for some reason her party mates did not share her own taste in herself, and departed. Too bad for them, more for me.
Can she give herself a speech on her own greatness (while she is alone in front of her "mirror of truth") to grant herself temporary HP?
Inspiring Leader allows you to (emphasis mine):
Is 1 a number included in up to 6? Check
Can you include yourself? Check
Do you need more than one? Not stated anywhere, so no.
The benefits of talking to yourself never looked so good. Even if it is just temporary.