|Previous Affiliation||Aizen's Arrancar Army|
|Previous Occupation||Decima/Cero Espada|
|Base of Operations||Las Noches|
Attack on IchigoEdit
On Aizen's orders, Yammy was sent to Karakura Town, accompanied by Ulquiorra Cifer, to "test" Ichigo Kurosaki. Arriving in a small park near the town, Yammy killed several nearby humans by consuming their souls, which attracted the attention of Yasutora Sado. Yammy easily defeated Sado, but was stopped from killing him by Ichigo. The two fought, and Ichigo initially had the advantage, severing Yammy's right arm, but was then assaulted by his Inner Hollow, allowing Yammy to land a sucker punch on Ichigo and beat him viciously.
Just before Yammy could kill Ichigo, Ben Tennyson arrived--having been sent by Professor Paradox--and transformed into Diamondhead, much to Yammy's surprise. They fought, and Diamondhead overpowered Yammy, despite the latter firing a Cero at him. When Kisuke Urahara and Yoruichi Shihōin arrived to further assist Ichigo, Yammy and Ulquiorra were forced to retreat back to Las Noches, and reported the events to Aizen upon their return, with Yammy seething over his humiliation at Ben's hands.
Sometime after his encounter with Ben, Yammy's severed arm was healed by Eon.