aestheticsymbols
Use in a combo

Coffin copy & paste

⚰ is coffin, a plain-text Unicode symbol from the Miscellaneous Symbols block. On Aesthetic Symbols it lives in the charms & marks collection, tagged skull. 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+26B0
HTML entity
⚰
CSS content
\26B0
JavaScript
\u{26B0}
UTF-8 bytes
E2 9A B0
Made of

U+26B0 ⚰ · Miscellaneous Symbols

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.