Twitter's count of "characters" is code points after normalization[1].
I don't know who expects emoji to count as one character, but they'd be surprised by Twitter's behavior: something like [2] counts as 4 characters (woman, dark skin tone, zero width joiner, school).
I don't know who expects emoji to count as one character, but they'd be surprised by Twitter's behavior: something like [2] counts as 4 characters (woman, dark skin tone, zero width joiner, school).
[1] https://developer.twitter.com/en/docs/basics/counting-charac... [2] https://emojipedia.org/female-teacher-type-6/