Possible to dot your Is with hearts?
tex.stackexchange.com
tex.stackexchange.com
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.
Biblically accurate cyrillic O character.
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...
The quest to bring empathy to quaternions still remains an elusive problem to be solved in a future paper should funding continue.