rengoku (sword) (fate)

Okita Souji Alter's signature sword. It has a unique hilt and a red accent on its blade, and is stored in a gold-accented sheath.

During the Chaldea Summer Adventure event, its personality gains a humanoid form, and both itself and Okita Souji Alter (Swimsuit Saber) utilize modified versions of Rengoku's sword form. During the GUDAGUDA Shin Yamatai-koku event, he possesses her body as the dominant personality under the name Rengoku Alter, resulting in her gaining a flat chest.

Not to be confused with other ordinary katanas that she wields.

Appearance

Okita Souji Alter wielding Rengoku

Okita Souji Alter wielding an ordinary katana in her right hand with Rengoku sheathed at her waist

The divided forms wielded by Okita Souji Alter (Swimsuit Saber) and Rengoku