Alternate hairstyles of official origin, whether it be from the creators themselves, or from second-parties involved in the given copyright. Generally a hairstyle other than the standard one the character appears in.
These can often times appear in manga/anime (beach episodes, as one example), video games (whether as unlockables or as skins to be bought in gacha games), and on special events. Figures which can have such hairstyles include Virtual YouTubers.
Do not use this tag with alternate hairstyle, the tags are mutually exclusive.