Board Thread:General Discussion/@comment-24100805-20160201152915/@comment-26103867-20160829052503

To me, Chara is a girl and Frisk is a transgender girl (born male but identifies as female).

Also,

Finnpen37 wrote: Both Frisk and Chara posess your gender, so if you are male, they are boys. if you are female, they are girls. I am a male so they are guys to me

That's not true for everyone because I'm a guy and, like I said above, they are both girls to me.