aestheticsymbols
Use in a combo

Star of David copy & paste

✡ is star of david, 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+2721
HTML entity
✡
CSS content
\2721
JavaScript
\u{2721}
UTF-8 bytes
E2 9C A1
Made of

U+2721 ✡ · 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.