Sistina Shiga

Background
The 6th Princesses of Shiga Kingdom. She is allowed to go in and out of the royal castle's forbidden library. Her mother is the daughter of Duke Bishtal. Shistina is friend of Arisa and Mia. Princess researches magic way to turn monsters back into ordinary creatures. Later The King declare after giving the inauguration of the Tourism Ministry vice minister to Satou, that Shistina is going to be his fiancee, thus she joined Satou party together with Karina, Sera and Zena.

Trivia

 * Satou remarked that she is taciturn, when she's not speaking about her favorite things.