Namakubi

Namakubi (生首 namakubi; Jap Lit Translation, "Freshly Severed Head,") was an inmate of Seireitei's most highly secured prisons. Bound in a Sekisekki carriage, Namakubi planned to escape with the Tenma Senshudan pact/group as their Vanguard, covering the flanks and reinforcing their positions during hostile conflicts.