aestheticsymbols
Use in a combo

Heavy outlined star copy & paste

✭ is heavy outlined star, a plain-text Unicode symbol from the Dingbats block. On Aesthetic Symbols it lives in the stars & celestial collection, tagged star. 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+272D
HTML entity
✭
CSS content
\272D
JavaScript
\u{272D}
UTF-8 bytes
E2 9C AD
Made of

U+272D ✭ · Dingbats

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.