To an extent yes. Metastacia and Kaien fused. When they were killed, they were transported back to Hueco Mundo where Aaroniero devoured them, absorbing all that was left of Kaien.
Since Aaroniero Arruruerie ate Metastacia, who fused with Kaien Shiba. Would it mean that Kaien is alive, and Rukia would technically be fighting Kaien
To an extent yes. Metastacia and Kaien fused. When they were killed, they were transported back to Hueco Mundo where Aaroniero devoured them, absorbing all that was left of Kaien.
To an extent yes. Metastacia and Kaien fused. When they were killed, they were transported back to Hueco Mundo where Aaroniero devoured them, absorbing all that was left of Kaien.