I have a few but I don't want to spam:

~How are Asgore and Toriel doing, relationship-wise?

Toriel: To say the least, although we've had our differences in the past, I forgave him for doing what had to be done, and I regret my choices. He clearly needed someone to help him.
Asgore: Tori... 😅 Anyway, we are happily married again ❤️

~Are the Skelebros seeing anyone?

Sans: Me and Papyrus are both single. Really, we haven't found our type yet. Papyrus isn't really a dating kind either, at least not to my knowledge.
Papyrus: I have many things to do, and I don't have time for dating as of now!

~What is everyone's orientations?

Me: Here's a list.
Kitty: Asexual (in real life)
Toriel: Straight
Asgore: Bisexual
Flowey/Asriel: Asexual (as a flower), Bisexual (as Asriel)
Frisk: Pansexual
Chara: Bisexual
Papyrus: Bisexual
Sans: Bisexual
Undyne: Bisexual
Alphys: Bisexual
Napstablook: Bisexual
Mettaton: Straight

Me: Pretty much everyone is bi except Toriel and Mettaton lol
Toriel: Asgore is bisexual?
Asgore: *shit she found out act natural o-o;* 😗🎶
Toriel: I still love you, no matter what ❤️
Asgore: ^^

~Does anyone know Flowey's secret?

Flowey: I've only told Chara and Papyrus, and Frisk found out by themselves. Clever kid. Er, don't tell them I said that.

Leave more asks/dares in the comments! I can't believe someone actually reads this lol