LavenderLolly: *it seems someone covered the first part with Whiteout* Huh,what,where,when,how- I mean, salutations all uwu
Frisk: Hiya!
Chara: Hi
Asgore: Hello
Toriel: Greetings my child
Undyne: Hey punk!
Alphys: H-Hi
Mettaton: Good morning darling!
Napstablook: *The message already rejected itself*
Sans: Sup kid.
Papyrus: Greetings human!
Chara: ... Wait that wasn't anything! That was just all of us saying hi right back!
Frisk: Chara be nice...
Chara: Fine.
---somewhere else---
Red: *Is exploring a forest when she gets whapped in the head by the hello* ... Hi there.