The female Inkling player character from the Splatoon series. Their male counterpart is the Inkling Boy.
As of Splatoon 3, all hairstyles are no longer gender-locked. In order to tell apart male and female inklings in this iteration, the only discernable difference is sometimes just the eyebrows; see the expandable below for more details.
If the gender is not overtly clear, resort to using ambigious gender tags instead.
Splatoon Wiki: Player Settings
This tag implicates inkling_player_character (learn more).