This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as sauna and steam room.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F9D6 prohibits a line break after it, if it’s followed by an emoji modifier.
The CLDR project calls this character “person in steamy room” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: day, luxurious, pamper, person, relax, room, sauna, spa, steam, steambath, unwind.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 🧖︎ The character can be changed in appearance, if it is followed by an emoji modifier. See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A sauna (, Finnish:[ˈsɑu̯nɑ]) is a room or building designed as a place to experience dry or wet heat sessions, or an establishment with one or more of these facilities. The steam and high heat make the bathers perspire. A thermometer in a sauna is typically used to measure temperature; a hygrometer can be used to measure levels of humidity or steam. Infrared therapy is often referred to as a type of sauna, but according to the Finnish sauna organizations, infrared is not a sauna.