Board Thread:General Discussion/@comment-27213375-20160305063709/@comment-36554724-20180824084420

Oh god, well... here is what I think.

Frisk: I believe Frisk is around the age of 10 or maybe a few years more (probably less the fifteen).

Flowey/Asriel: Well, I believe that both physically and mentally, Asriel is around the age of 9 or 10. However, I believe that due to certain reasons, Asriel is technically over 20 since he obviously died a long time ago.

Chara: I believe Chara is around the same age as Asriel, both physically and mentally, but I think they died a long time ago along with Asriel, so I believe Chara is also technically the same age as Asriel, being in they’re 20s.

Asgore: Well, clearly Asgore and Toriel are the oldest characters here. While they may physically look very young, probably looking like their probably in their 30s, I believe they are much older than that. Clearly, Asgore was born before the war between humans and monsters, in a matter of fact, he would fight in that war himself. Clearly the war happened a few centuries before Undertale ever happened, so maybe Asgore is over 300 years old, maybe he is even in his thousands.

Toriel: I am guessing that she is around the same age as Asgore, but probably a little younger. So, maybe she is over 300 years old, or maybe she is even in her thousands.

Sans: Well, is kinda a hard one, but due to his behavior, he kinda reminds me of someone in his mid 20s, so maybe Sans is like 25? I do not know. There is also a possibility that Sans could be much older than looks, so he could possibly be in his hundreds, but I kinda doubt it.

Papyrus: I believe Papyrus is about 2 or 3 years younger than sans, so I believe he is about 23-22. Like Sans, he could be much older than that, but I pretty much doubt it.

Undyne: I am guessing that Undyne is probably in her really late teens or maybe she is in her really early 20s. I doubt that she was born before the war between humans and monsters, like Sans and Papyrus, besides, she wasn’t even seen in that picture at the beginning of the game that took place during the battle. So, maybe she is like 19-22.

Alphys: I believe Alphys is about a year older than Undyne, so maybe she is about 20-23.

Mettaton: Remember, Mettaton is actually a ghost possessing a robot. I believe Mettaton has indeed been around for a while since he is a ghost. Maybe he and his relatives such as Napstablook were once monsters at one point, but maybe they would die eventually. Maybe Mettaton is mentally in his teens or early 20s due to his behavior, but he could also be a lot older at the same time.

Napstablook: Well, obviously he is around the same age as Mettaton. Mentally in their teens or 20s, but maybe they is much older.

Monster Kid: I am going to guess they is about the same age as Frisk.