PeekACoo
I really like his interaction with Kurama and hope they become great friends during their training. Kurama could also learn Haki, while he’s at it. I bet Robin is gonna love Kurama in his chibi form, when he is summoned. He would definitely enjoy this world better than the shinobi’s. I hope He pulls a “Bleach” sword. More like swords born with his soul in it, when they are forged. When he is more efficient in fuinjutsu, he could use the gravity and resistance seals on him and Robin. He could even help some members of the RA get stronger with it. Anyway, can’t wait for more. Excellent chapter
If auhor decides to use a Bleach Zanpakuto as a second sword, Zangetsu is KINDA obvious as a choice since his second form allow him to send flying slashes attacks and is made for duel. The blade is already a bit similar in abilities to the ones from one piece. Also, by remodeling Kusanagi in a more "japanese" form, if you consider it as a extending and retractable poisoned blade related to a slimy guy who is a traitor but not too much... Then yes if you reforge kusanagi a bit and buff it in the process then it is gonna become another "shinsou" or "kamishininoyari" whatever was the name of gin ichimaru's sword.