[acadapter]

Heart-dotted i and j should be added to Unicode.

Medieval monks used to do this with the first letter of the word for "eye" (oko), and those got added, despite the fact that one of them had only one historical occurence.

https://en.wikipedia.org/wiki/Cyrillic_o_variants

[Suppafly]

Monks having a laugh by making the Os in the word for eye look like eyes, and now we have unicode support for that, amazing.

[xg15]

Ꙩ, Ꚙ, Ꙭ and ꙮ are definitely underutilized as emojis...

I'm finding it kind of hard to take the Unicode approval process serious though, when we have to use complicated multi-codepoint escape sequences to produce a simple country flag because character codes are supposedly a limited resource now and can't be assigned nilly-willy - yet an inside joke some medieval monk made like 600 years ago positively HAS to be encoded as its own character...

[sph]

Quoting from Wikipedia, "серафими многоꙮчитїй" (serafimi mnogoočitii, "many-eyed seraphim")

Biblically accurate cyrillic O character.

[lifthrasiir]

Those variants do have semantic differences from normal glyphs at least for some manuscripts (because it was only used for eye-related words), and were even reproduced in more modern literatures. Heart-dotted i and j are, at least for now, just stylistic variations. You can probably propose a variation selector for them, however.