Please remember the following thing if you plan to post Undertale stuff: Frisk and Asriel are children therefore come under the loli/shota tag. thank you.

That'd be the shota tag, not loli.

I've never heard of 'undertail'. I know of 'undertale', but not what you are mentioning.
Are you sure that there is any art of that game? Or am I just out of the loop.

Pretty sure Undertail isn' a game though..

To be fair, 'undertail' is the tag that was suggested to be used for people drawing smut of the game on tumblr so that the actual game tag didn't bring up that kinda' stuff, if I recall right.

[Tho tagging frisk as either would get awkward unless the image clearly gave them a gender what with them generally being androgynous whoops]

Actually, Frisk and Chara are purposefully unidentifiable in gender in order to make it easier for the player to place their self in the character's role. So you'd probably be better off using both loli and shota.

That said, the majority of fans make Frisk and Chara female, because why not?

Nobody wants to play as guys in indie jrpgs. It's a scientific fact.

That being said, there's quite an amount of trap Frisk and Chara art.

It's weird. I almost always see androgeny as female. Frisk is female, NiGHTS is female.

i apologise since i block both i didn't relise that shota is used for young boys. the comment still stands that no mater where you stand gender ways they are children

That's probably because the only real way to portray androgeny is to go halfway between masculine and feminine features. The thing is that half way point is round. Masculine traits include well defined lines. Even in real life guys tend to have more well defined chins and facial features. Without those defined lines you get round. And round features are classically associated with femininity.