Frisk, 15-17

Flowey, Immortal

Toriel, 53

Nabstablook, 18 before he became a ghost

Sans, 18-21

Papyrus, 15-17

Undyne, 21-23

Alphys, 20-22

Mettaton,16-18

Muffet, 16-20

Asgore, 60-68

Asriel, 10-13

Chara, 15-17 (otherwise immortal)