authors note (a/n)

Sans has an older sister named Mari. Sans, Mari and baby papyrus live a happy life. But what happens when another human falls down into the underground?
Ages:
Sans: 12-?.
Mari: 15-??
Papyrus: 2-??
Undyne:16-??
Asgore: 29-??
Toriel: 27-??
Human:17-??
Other characters I might add to the list will be put below