[Superbia]

Originally Posted by Singally

Don't they need to love him for him to seal them? I don't remember it saying they simply have to trust him, but actually needed to like him for it to work.

From Volume 2

"…Speaking of which, why must I seduce the Spirits in the first place? You can just seal the Spirits' powers by kissing, right? In that case, there's no need to abruptly strike——"

"Oh my, is forcing yourself on others what you prefer, Shidou? Good luck in not having your name appear in the morning newspapers."

"I won't be in them!"

As Shidou shouted, Kotori shrugged her shoulders in a relieved manner.

"——It’s useless. If the Spirits don't open their hearts to Shidou, they won't let you seal their powers completely."

"Is-Is that so…?"

"Yes, and I don't particularly mean that they have to be deeply in love. At the very least, it will be hard if they don't trust you enough for them to not refuse the kiss. That's why Reine monitors the Spirits individually on their mood and positive feelings."