So these are my headcanons for Chara and Frisk as they grow up!

I’ll be doing Asriel and Monster Kid too later on when I find the time.

A tiny bit more info on these designs below!

Starting with Frisk, the first design is around age 8-10 (height 4′6) with their regular clothes so there’s not so much to be said about the design.

The next design is when they’re in middle school, around age 12-13 (4′11), and they are obviously dressed pretty awfully! But this is only partly due to their not so great fashion sense, the other part is because if they dress flashily, then maybe people wouldn’t notice the bags under their eyes… The stress of getting humans and monsters to get along, the paranoia of a reset possibly happening at any moment, as well as regular bullying makes for a really shitty few years of middle school for this kid. Luckily some notice and try and help them out so they get at least a little better as time goes on. This time is when they start dying their hair and that sticks with them throughout their life. They also are given their own heart locket from Asriel and Chara to wear, and like the other two they wear it at all times. They had a few blemishes around this time, mostly brought about from stress and the like.

After that is Frisk’s high school design, around age 16-18 (5′3), and they are dressed in nice colors, the design is meant to be based in winter clothing haha. They still have some nights where sleep doesn’t come easily, but overall, high school was kinder to them than middle school was. The scarf on their neck was a gift made by Chara.

Finally, Frisk’s adult design, around age 20-22 (5′6), in this design they are fully incorporated into the role of ambassador and they take their job very seriously, learning as many languages as they can and doing their best to make human/monster relations be on good terms. They often find themselves travelling to different countries for meetings and they love it when they find the time to come home (especially if Chara and Asriel are there as well.)

Moving on to Chara, the first design is just their regular design, around age 8-10 (4′7), so there’s not much to say on the design.

For the middle school design, around age 12-13 (5′1), they were involved in an…unfortunate accident with their hair that caused a slight problem with how it looks, and because of this they stick to wearing their beanie (that Frisk and Asriel bought for them as an apology) at all times until their hair is somewhat presentable again. Unlike Frisk and Asriel, they do not go to school, instead they are homeschooled or take online classes, as being around humans other than Frisk still makes them uncomfortable. Their shirt says “it was the best of thymes, it was the worst of thymes.” They had to get braces during this time and they were not happy with this development.

For the high school design, around age 16-18 (5′4), Chara has fully embraced their love of plants and works on their home garden regularly, even selling some of what they grow to some monster friends and family. They are still an insomniac, and they likely won’t stop being one, but they’re fairly good at hiding what they feel, and being around plants is one of the few things that genuinely makes them happy.

Finally, for their adult design, around age 20-22 (5′5), they are a botanist, and they travel alone to study plant life around the world, though they make sure to come back every now and then to be with the ones they care about (namely Asriel and Frisk, though thankfully skype is a thing.) They made the little journal they’re holding and they draw and write about any interesting plants they may come across in it. They also knit themselves their sweater, and it’s usually hand knit gifts that they give everyone for birthdays and the like.

That’s all I’ll say on the designs! I hope you like them!

If you have any questions, feel free to ask!