aestheticsymbols
Use in a combo

Superscript y copy & paste

ʸ is superscript y, a plain-text Unicode symbol from the Spacing Modifier Letters block. On Aesthetic Symbols it lives in the tiny & superscript collection. As plain text it takes on the font and colour of wherever you paste it — a bio, a username, a caption or a stream title.

Unicode
U+02B8
HTML entity
ʸ
CSS content
\2B8
JavaScript
\u{2B8}
UTF-8 bytes
CA B8
Made of

U+02B8 ʸ · Spacing Modifier Letters

Will it show up? · Long-established text symbols

Plain-text characters from blocks that mainstream desktop and mobile fonts have covered for years. These are the safe ones.

Worked out from how each character is encoded, not from a test on a real device.