Yamamoto Genryusai and the White Magatama

As a gesture of goodwill for the alliance, the Senkaimon that had originally been unable to connect Soul Society to Hueco Mundo could finally be linked after receiving the King of Hueco Mundo's consent!

Aoto, as Captain-Commander, personally used his Zanpakuto to establish the connection.

The Precipice World between Hueco Mundo and Soul Society was far thicker than the one between the World of the Living and Soul Society.

Without the King of Hueco Mundo's consent, every connection could be destroyed by him at any time.

This counted as a commemorative first.

Thus, under Ulquiorra's supervision, the Soul Reapers, including Aoto, along with Gin Ichimaru as a "hostage"...