There was indeed a spell that could use a child as the catalyst to help locate a parent. But, it was already difficult enough to locate an ordinary person in real life, not to mention that the goal this time was to find someone who had been spirited away to the gods' realm.
Still, it was worth a try.
Before trying to locate Chiaki's mother in the Realm of Cherry Blossoms, Seiji decided to try locating her in the real world.
Natsuya took a sample of Chiaki's blood and some of her hairs to cast a locating spell. But, as expected, the spell failed.
When all the knight order members arrived, everyone trained in the Domain as usual. After Seiji collected all the Inner World Crystals from everyone, he went into the Domain again with only Natsuya, Shika, and Hitaka.
