It has been a couple of months since Nagi has become part of Tsuna's family. She has been more than happy to be of any help for her Sawada-sama. She has gotten a letter and half a ring in the mail from Sawada-sama's father. The letter states she is the Sawada-sama's mist guardian. And that there is battle for who keeps the rings, but she doesn't know how to fight.

"Good evening, Dokuro-san. I'm here to train you in the ways of the mist. My name is Bouche Croquant"

"Th-the mist."

"Yes, you were chosen to be the 10th generation mist guardian, no?"

"Yes, but…"

"Good, because training starts now."

"Wait I..."

All of a sudden Croquant-san disappeared. She wasn't in her bed, instead in some swirly dimension.

"First you need to be able to identify an illusion."

Nagi was now in an open field in the dead night. Next a giant rock comes flying towards her.

"Ahhhhhhhh"

She opened her eyes and found she was unharmed.

"You know I could've destroyed you if I actually used any effort in the illusion. Here take this flag, most illusionist use weapons to control their illusions."

After a night of extensive training she decided to rest body for it was very weak from training and critiquing her own moves. She was shocked to see she had been asleep for nearly three days.

"You're finally awake. Just so you know the other guardians are losing 2-1. The battle happening tonight was a success so it is a tie."

"So tomorrow I have to fight"

"Yes and know this. You are going against an arcobaleno so this is no joke. It's okay if you lose, just know that if you do there is a huge chance you won't make it back without being mentally fazed."

"O-Okay."
And with that, Nagi Dokuro has joined the ring conflict.

Mammon vs Nagi Dokuro Battle Start

'Nebbia Coperta'

Nagi started fading away.

"Heh, you think an amateur level move would work on me, Phantasma go 'Serpente Venti' blow her away."

Nagi who was about to attack was pushed back and her 'Nebbia Coperta' was gone. She then started twirling her flag crashing it against the ground. Mammon unfazed stood there, he then was capture in a pillar of flames.

"That's not going to cut it."

Mammon appeared behind here and wrapped her in tentacle things. She turned into a statue and Mammon was pulled to the ground.

'Una Nebbia di Pegno'

Mammon was in an indigo sphere and the sphere started shrinking and crushing him.

"Ouch ow ow ow"

Nagi then appeared and wanting to finish this with her best move. To power up the move she said,

'Muro di Dissolvenza'

Deciding now is the time to go for it.

'Entità Figura'

When Nagi found she hit nothing was shocked. Realizing what was happening she quickly tried to sheild herself, but was to late.

'Incubo Cappotto'

Nagi couldn't move herself. She was then delt some severe muscle damage and joint pain.

"Ahhhhhhhhhhhhhhhh"

Nagi wanted the pain to stop the pain was too much. Right now screaming was like being stabbed in the stomach. The excruciating pain was way too much for Nagi to handle. She then fell to the gound. Cringing in a fetal position.