Soldier On;

[Senroku]

The Hollow War

i waz lyk D;
During a chase after Hollows through the forests of Earth, Senroku meets a Quincy by the name of Axel. The two began to fight until they are met by a potential hollow army, in which they must fend off. During the bout Senroku unleashes Bankai, though must quickly flee after Axel is bested by what appears to be the Primera Espada.

Recovery and Shock
Axel is returned to the Shinigami hospital quarters, where he is awoken only to be interrogated by Senroku. Senroku was looking for answers about the Primera Espada and his skills, so that in future he could defeat him.

From the Hallows
Hollows and Arrancar attack Rukongai during Senroku's patrol shift, and several other Taichō also join the fray. It turns out too be a suprise attack, and Senroku and several others must fight to survive.

Salvation! A Promise Born from his Fists
After saving the life of Kenichi from the Primera Espada, Senroku gets answers on who the mystery Espada actually is, and vows too himself that he will bring him down, after witnessing him defeat both Axel and Kenichi. He promises to train Kenichi once he has then recovered.

Training Days
Senroku enlists the aid of Shuyan, another Captain, too help train Kenichi so that he may achieve his Bankai state. While the training is tough, Kenichi's attitude allows him too pull through, even fighting against two Taichō.

The Hill of Common boredom
After witnessing fire atop Sōkyōku hill, Senroku travels up there too investigate. Once he arrives he meets a cocky, smartass Shinigami, who drives him to the point where Senroku wants to do nothing more than fight him, so that he will shut his mouth.

Awakening
After Senroku and his men are sent to Earth to fight off a Hollow threat on Kagamino City, an Arrancar appears and wipes out his squad. Senroku attempts too fight the Arrancar, though is beaten to an inch of life. When it all seems like it's over, Senroku's Hollow form is revealed too save him.