Roihime

Roihime is a Japanese name, likely a modern coinage or a literary creation, as it doesn't appear to have a long historical usage as a traditional given name. The components 'roi' (likely from 'ro' meaning 'dew' or 'fire', and 'i' a particle) and 'hime' (princess) suggest a poetic or descriptive quality. Given the 'known gender' as male, it's possible this is a unique or fictional name where 'hime' is used metaphorically or in a non-traditional gender context, as 'hime' almost exclusively refers to females in Japanese. However, without further context, the direct translation of 'hime' points to a female association. If 'roi' is interpreted as 'fire' (from 'ro' as in 'ro-bi' for 'fireplace' or 'ro-en' for 'flame'), then 'fiery princess' is a plausible meaning. If 'roi' is from 'roi' meaning 'dew', then 'dew princess' is another possibility. Given the male gender specified, it's highly probable this is a unique or fictional name, perhaps from a specific story or character.