U+3299, ㊙
CIRCLED IDEOGRAPH SECRET

[U+3298]
Enclosed CJK Letters and Months
[U+329A]
Presentations of ㊙︎
Text
style
Emoji
style
㊙︎ ㊙️
Note: Character's appearance
may be different on each system.
Text style is forced with ︎
and emoji style with ️

Emoji