Sharna has shoulder length black hair and has yellow eyes. She wears glasses and is usually seen wearing a Hakuo uniform.
She first appeared when Fumi Hibino went to Hakuo Academy and revealed to her that Hinagiku is the current president of the student council.
She later appears again when Fumi takes part in a quiz contest.
Golden Week Arc
Later she appeared on a plane with Fumi stating that they were going to Turkey to take the silk road to India during the golden week.
A girl and her Dog
InChapter 317 she concludes that Fumi has committed a crime since her dog stole a suitcase with 1 hundred million yen inside. Later she comically stops Fumi from escaping from the Violet Mansion after she wipes her fingerprints off the suitcase used to hold Wataru's Money.
Recruiting a potential maid for Isumi
She appears again with Fumi in chapter 341 when Fumi was looking through a pamplet recruiting potential maids for Isumi.
(To Fumi [Ep. 25 S2]) "I'll punch you in the face if you don't listen to others."
According to her character profile from Volume 16, Sharna comes from a big family and has many grandfathers, grandmothers, brothers and sisters.