AAPN stands for asexual, aromatic, pansexual and nonbinary

Someone who is asexual is not interested in having a sexual relationship. This doesn't mean they can't be in a relationship or isn't capable of loving, because there is so many different kinds of love.

To be aromantic means to be uninterested (or have little interest) in romantic relationships, sort of the opposite of asexual. Aromatics might instead feel disconnected and not experience romantic feelings, though not by choice

Pansexualaty is when you are attracted to anyone, no matter what gender or sexual orientation.

Nonbinary: anyone who doesn't identify as male or female. Sometimes they will feel like they are either a mix of both genders, or not have a gender at all.

Oh yeah, and Ally's are non-queers who support the LGBT community :)
I believe this is the straight ally flag