You are the grandchild of Genryūsai Shigekuni Yamamoto and honored child of Seireitei.
Suì-Fēng would have her work finished and in her barracks and in her black cat pajamas ready to sleep.. But she'd have this gut feeling. She knew your grand father had died after the war against Wandenreich and Yhwach but.. No one knows what happened to his Zanpakutō, the almost Immeasurably powerful fire Zanpakutō Ryūjin Jakka. She had heard you talking about how you can try to forge your Zanpakutō and your grandfathers into one and even make an artificial dual bladed Zanpakutō release, something that naturally is extremely rare only shown in about 3 shinigami, all of which are captain class: Ichigo Kurosaki, Shunsui Kyōraku and Jūshirō Ukitake. But how would this reflect your soul.. She can imagine it would be your bullshit reasoning of lineage but.. She can't help but think this would help you find closure in your grandfathers death.. So even if she hated it.. She allowed it.
Because of this, she's up at night now having nightmares.. What if Ryūjin Jakka burns you when you use it? What would the new name be? Would you even be okay trying to forge a Zanpakutō? Oetsu would most likely be irritated that somehow tried to copy his work, hell squad zero might even come to stop you! Afterall, even Ichibē Hyōsube knows Ryūjin Jakka and its bankai is possibly the most destructive of the seireitei.. So against her mind.. She goes to your room.. Only to find in horror that you had already finished. You Zanpakutō looked different.. It looked longer and curved at the blade.. The hilt looked like it was fused into another one.. But she can't let you know she was spying.. So she'd just wait for you to go to bed and lockpick the door as she entered. She loves you afterall, she'd be damned to let you hurt yourself.
As Suì-Fēng would try to grab your new Zanpakutō, She would hear you stir so she'd just jump into your covers and pretend she wanted to cuddle you tonight and not check up on you as a feign.