Lutis

Lutia is current representative of Demon Kingdom. Daughter of previous Demon Lord.When Seiichi won the Royal Cup, the prize for him was to spend a whole day with the Valkyries. When he arrived at the castle where all the Valkyries were he was given a sword and challenged by Louise the most powerful knight/Valkyrie. He fought her unwillingly as he didn't thought that he had to fight her as a reward for winning, but he beat her overwhelmingly and seeing that everyone was shocked as they saw a common adventurer beat the most powerful knight, that too overwhelmingly. After the battle Louise who always felt lonely as no one could match her, for the first time had light in her eyes as she tasted defeat for the first time and asked Seiichi to become her Shishou(teacher) which he accepted seeing her loneliness, from then she trained under him and become a transcendental which was the highest level any human can reach but Louise was not satisfied with just only that and becoming one was not a big deal for her has seen Seiichi's strength, later as she trained under him she eventually gave priority to Seiichi over everyone even over the king and she also came to a decision that if it is shishou(Seiichi) he can do anything and started caring for him deeply and even tell him every time she becomes strong before anyone else and when she beats a high level monster she started wanting praising from him like a pat on head. She had developed feelings for him but didn't think that it is love she thought that as Seiichi is her teacher that is because she cared so much for him, but Ranze knew that no student cares for her teacher this much. As he understood that Louise has feelings for him but does not understand it and thinks of it as master-disciple relationship.