*Selenia is princess of the Kingdom of Minimoy. She is destined to save her people from the Seide menace. Trained in combat, she is particularly proud and cold, but also headstrong and above all, dedicated to her mission. Selenia is the daughter of Emporer Sifrat, She is 1000 years old in the years measured by the blooming of the selenia flower.

She has a younger brother Prince Betameche. She has a determined character, strong-willed In the pre-edited version, the love story between Selenia and Arthur has much more too it, involving the tradition of the first kiss exchange meaning that the two that kissed are wed.

Selenia kisses Arthur and thus, they are wed, a following tradition is mentioned saying that now they must wait 1000 years before kissing again, because "Desire and faith has to be put to the test" "That which is rare is always valued highly." (as quoted from Selenia in the deleted scene of Arthur and the Invisibles) Princess Selenia is around 1,080 years old (in Minimoy Years) in the 2nd and 3rd movies of the Arthur trilogy.

In the 1st movie she is 999. After getting to know Arthur, she falls in love with him. Arthur had begun to fall for her earlier, upon seeing a sketch of her in his grandfather's journal. She is a master martial artist and kisser.*