aestheticsymbols
Use in a combo

Shadowed white Latin cross copy & paste

✞ is shadowed white latin cross, a plain-text Unicode symbol from the Dingbats block. On Aesthetic Symbols it lives in the charms & marks collection, tagged cross. 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+271E
HTML entity
✞
CSS content
\271E
JavaScript
\u{271E}
UTF-8 bytes
E2 9C 9E
Made of

U+271E ✞ · 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.