Where does this style work?

It works wherever plain text is accepted — bios, usernames and comments — because the letters are real Unicode characters, not a font.

Can I copy it together with other words?

Yes — copy the whole output and paste it next to plain text; every letter stands alone.

Clean sans-serif math letters

Sans is the upright sans-serif mathematical alphabet (𝖠-𝗓, 𝟢-𝟫) — clean, modern and legible everywhere.

𝖸𝗈𝗎𝗋 𝗍𝖾𝗑𝗍 𝗁𝖾𝗋𝖾