Note: Dís will look male to anyone who is not a dwarf (maybe even to dwarfs from other canons) as the binary between the sexes is very weak among Tolkien dwarves and females are canonically typically read as male by other races - they also aim for that, for safety's sake, so she will most likely roll with the mistake and even support it. If you want your character to realize that she's female without her telling them, please talk to me first.
Canon: Tolkien's Middle Earth Compendium
Daughter of Thráin, sister of Thorin and Frerin, mother of Fíli and Kíli.
Book canon, with the movie as a supplement canon.