[pbhjpbhj]

On Ubuntu, and probably other OS/distro too, ctrl+alt+shift+U gives you a underline-u symbol, type in the Unicode and then press <enter>.

[masklinn]

I'm not sure what use that would be? U+<hex> is a normal way to designate codepoints, and I can't put the actual emoji in the comment as they're stripped on submission.

[pbhjpbhj]

Ah, sorry, that comment was for those playing along who might want to see the listed glyphs.