Because I Just Realized I Never Really Drew Everyone In A Line Before And I Just Referenced From The Scene On The Surface - Blog Posts

Indeed

Gaster just has a very simple face. You kinda have to work to get it detailed enough that it’s hard to do in a 10 sec sketch

yeah, exactly XD i did redraw the base oval a couple times just so it wasn’t completely lopsided or more of a spiral than a closed shape, but it didn’t take me long to get a good one and after that is was just eyes, mouth, cracks, boom he’s done. flowey’s on almost the same level of simplicity, i felt like a little kid again drawing him XD

Anonymous said to undertalethingems: Somehow no matter what anyone does to frisk, no matter how much they are butchered, they will always look accurate. I think it's the face

yep, that -_- is pretty much their trademark, it’s great XD

tbh the generally simple and straightforward character design of undertale is one of its strongest features; you can boil these characters down to the barest caricatures and they’re still recognizable. that’s some really good character design, and i love it. ^^