Board Thread:General Discussion/@comment-27324545-20160105135410/@comment-39582005-20190525110146

I mean, theories point that sans was here during, or before the war. Considering his knowledge on the surface world. I believe that Sans is old, much older that Papyrus, who has no information on the surface. Sans must have been alive before the monsters went underground. He must be almost as old as Asgore, or slightly younger. This is my age prediction:

Sans: Depends on how long te war/aftermath was

Asgore: Same as Sans, but older (Maybe)

Frisk: 8-12

Chara: 9-14

Papyrus: Late teen-early 20's

Undyne+Alphys: 20's

Toriel: Old... Remembers the war

Gaster: Old as F***

Flowey: Immortal

Asriel: Immortal/12