[Despite everything that Kairi explains, Terra can't really see much of a correlation when she explains the spell. But touching the Keyblade...? Could that have been enough?]

Aqua is very talented with magic, and I think her spell may have been why you found your way to Riku and Sora ... but I don't think any of that could be considered a ceremony.

Thanks for sharing that with me. [They couldn't have been very pleasant memories.]