At the same time that Lena had her lesson, Seyen led Lumi to her prison.
A human would ask Lumi what his problem was, wanting to execute defenseless pixies. Seyen, a pixie herself, had no such questions. Humans and pixies were enemies, were they not? In Seyen's eyes, the only difference between Lumi and most humans was that he realized this, and didn't delude himself.
It is only natural for pixies and humans to want each other dead. That was Seyen's genuine belief.
She thought she saw through Lumi. She believed that Lumi was doing this to reduce the total strength of pixies, and thus make them less dangerous to humans.
That was actually partially right. The other reason was that Lumi wanted experience, but Seyen couldn't possibly know that.
And you know what? Reducing the population and strength of pixies? Seyen was entirely willing to cooperate with that. Because Seyen really didn't care about pixies as a whole. Only her own personal power.
