Board Thread:General Discussion/@comment-27324545-20160105135410/@comment-36842083-20180906220314

Frisk: 8-9

Chara: same as Frisk

Toriel: ~100

Sans: 25-30

Papyrus: 20-22

Undyne: 23-25

Alphys: same as Undyne

Muffet (my waifu): 13-14

Temmie: 16-17

Asgore: same as Toriel but a little bit older

Asriel (child form): 10

Asriel (Flowey form): ~90 (it's Toriel's and Asgore's child so what do you expect)