Kirie Selas

Kirie is the second princess of the Curatio kingdom and a main character of the Einstein isekai franchise.

Relationships
 Idris Caligo 

Kirie already became briefly acquainted with Idris while watching the knights’ training as a young teenager. However, they only get to know each other when Kirie finds out about him leaving the military and she offers him her help as he goes into hiding, in exchange for him supplying her with information. She trusts Idris to be honest with her, and they have an overall fairly symbiotic relationship.