aestheticsymbols
Use in a combo

South-west arrow copy & paste

↙ is south-west arrow, a plain-text Unicode symbol from the Arrows block. On Aesthetic Symbols it lives in the arrows & pointers collection, tagged arrow. 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+2199
HTML entity
↙
CSS content
\2199
JavaScript
\u{2199}
UTF-8 bytes
E2 86 99
Made of

U+2199 ↙ · Arrows

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.