Well, as long as you can use these stickers in an in-line way. The graphic should be part of the sentence, not just an addition to it, although the latter should be possible too I guess.
You can’t, but there are a large set of built-in emoji-like inline graphics in addition to the normal emojis. Some of them quite good but the selection seems a bit random. They are privileged over keyboard emojis in that they pop up for selection when you type keywords. AFAIK users can’t create their own.
However, stickers have a culture of their own, and I don’t think it’s inferior to emojis, maybe it’s even better. You can express a lot in a sticker or two, without words, and quickly. And they’re not tiny ambiguous glyphs, they have the room they need.
So far in my Line experience I’m the only one using emojis (I should probably stop) because it seems like the standard is to use text to say specific things and use stickers to convey emotions.
I’m a foreigner and don’t have a million Line friends, but that’s how it looks to me.
