Bleach: And Then He Stood in Heaven

[In Bleach, I Fuse with the Hōgyoku from the Start, Then Stand Above the Heavens]

Fuzhu Qingsi transmigrated, only to find himself in a living hell: he was Jūshirō Ukitake’s younger brother, afflicted with the same illness and not long for this world.

Luckily, he unlocked a synthesis System that could fuse valuable materials into brand-new items.

[Vasto Lorde mask + broken Zanpakuto + stone containing abundant spiritual pressure + remnants of the Hōgyoku]

And, most importantly...

[Rangiku’s hair]

Synthesize!

Amid the shimmering, surging light, a gem containing boundless power flew toward Fuzhu Qingsi.

[Name: Hōgyoku]

[Properties: Makes the Host’s innermost wishes manifest and protects the Host. When the Host’s life is threatened or their abilities reach their limit, it helps them ascend to a higher realm.]

[Note: Transcends all, without end or limit]

Rangiku Matsumoto: “Could you stop plucking me already? I’m practically going bald!”

Nelliel: “If Nelliel eats this, can she surpass a Vasto Lorde?”

Retsu Unohana watched it all with a smile, quietly drawing her sword.

Many years later.

Yhwach:

“What do you mean they sent out an Arrancar named Nelliel who knocked my Royal Guard flying?”

“What do you mean the captain of their medical squad cut through the Sternritter?”

PS: Multiple heroines, lighthearted comedy.