Blue Monster Zone

Kindness and cruelty. Two parallels.

Luke couldn't figure out the connection yet, but there had to be one.

That is why the earlier, the better. Of what good is he as a summoner if he can't take his summons to their best?

After telling her his plan, Seraphina showed enthusiasm to cooperate.

Her enthusiasm made Luke realize that she didn't want to fight as he assumed. Seraphina just wanted to be involved in his activities.

Whether it was fighting monsters or not fighting monsters, she just wanted to follow his instructions and lend a hand where needed.

And this time, he was giving her something cool to do. She could observe humans up close, maybe interact with them, and learn how their relationships worked—which satisfies Condition 1 of her Potential.