Zephyranth Nectarine Celestine Potter-Black-Flamel-Peverell.

Age: 26

Hair: Short, wavy, black

Eyes: Emerald Green

Skin: pale olive

Feats:
Youngest Seeker in a Century,
Survived the Killing Curse twice
Saved Mr. Weasley's life,
Summoned a Patronus in Third Year,
located the Sorcerer's Stone,
killed a Basilisk,
Reclaimed the Marauders Map
started the DA,
won the Triwizard Tournament,
Destroyed the Horacruxes,
Defeated Voldemort for good,
helped overturn the rigid class system of the British Ministry,
arrested more Rouge Death Eaters than any Auror,
possesses all the Deathly Hallows
Achieved rank of Grand Dutchess (highest Wizard rank since there's no monarch)
Mastery of Defense Against the Dark Arts

Titles:
The Girl Who Lived,
The Chosen One,
Witch Who Won,
Merlin's Successor,
The Second Morgana Le Fey,
Mistress of Death,
The Conqueroress,
Mammon's Collector,
The Last Peverell Heir,
Lady Mystic,
Strongest Witch,
Lioness of Gryffindor,
The Lost Flamel,
Champion of Magic,
Marader Queen
Grand Dutchess of Magic

Animagus (Multiple):

Stag (main)
Thestral
Lioness
Dragon
Barn Owl

Skills:
Advanced Occlumency

Aggressive Duelist

Advanced Sword Combat

Animagi

Animal language

Apparation

Arithmancy

Aerial Caster

Combat Divination

Combat Transfiguration

Defensive Duelist

Dualcast

Evasive Flyer

Focused Spell

Fast Researcher

Herbology

Legilimancy

Greater Magical Dueling

Metamorphmagus

Magical Dueling

Parseltongue

Powerful Blast

Advanced Potion Making

Occlumency

Spell Block

True Seer

Wandless Magic

Conquest: (27 families or Death Eaters who tried to overthrow her over the years)

Avery: 694,000,000,000 Galleons

Carrow: 730,000,000,000

Flint: 580,000,000,000

Bulstrode: 677,000,000,000

Parkinson: 666,000,000,000

Mulciber: 613,000,000,000

Runcorn: 435,000,000,000

Macnair: 357,000,000,000

Rosier: 241,000,000,000

Pettigrew: 210,000,000

Selwyn: 524,000,000,000

Rowle: 467,000,000,000

Nott: 512,000,000,000

Pyrites: 534,000,000,000

Rakepick: 798,000,000,000

Travers: 643,000,000,000

LeStrange: 1,542,000,000,000

Yaxley: 659,000,000,000

Quierrel: 11,255,000,000

Lockheart: 32,570,000,000

Crabbe: 586,000,000,000

Goyle: 4,567,430,000,000

Lee: 22,057,685,000

Snyde: 758,000,000,000

Jugson: 673,540,000,000,000

Dolohov: 368,462,740,000,000,000

Rookwood: 895,146,300,000,000,000

Conquest from Tom: (4)

Slytherin: 44,000,000,000,000

Gaunt: 376,000,000,000

Cadimus Vault: 675,300,000,000

Riddle: 494,986,500 British Pounds

By will or to whoever offs The Dark Lord: (9)

Slughorn: 13,875,000,000

Crouch: 721,653,000,000

Gibbon: 1,231,000,000

Lowe: 411,000,000,000

Karkaoff: 68,720,000,000

Wikes: 249,000,000,000

Moody: 535,000,000,000

Snape: 22,573,000,000

Dumbledore: 570,000,000,000,000,000

By lineage: (11)

Potter: 770,000,000,000,000,000,000 Galleons

Black: 993,000,000,000,000,000

Flamel: 832,000,000,000,000,000,000,000,000

Peverell: 650,000,000,000,000,000,000,000,000

Anitoch vault: 34,000,000,000

Ignotius vault: 837,000,000,000

Gryffindor: 4,204,000,000,000,000,000,000

Pendragon: 978,000,000,000,000,000,000,000,000

Ravenclaw: 334,000,000,000,000,000

Hufflepuff: 318,000,000,000,000,000

LeFay: 720,732,300,000,000,000,000,000,000

Magical Inheritance:

Emrys:
968,475,583,700,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000

Body Type: Hourglass, Size F

After the war, Zephyranth thought she could finally relax and rest only to learn more of her lineage from the goblins.

According to the Right of Conquest, since she defeated Voldemort, she now has access to his vaults including the Riddle and Slytherin Family fortunes.

In addition, she found in her family tree some prominent names married into either her father's or mother's families. In her father's case there was Gryffindor, Pendragon, and Flamel of all things. For her mom, there was Ravenclaw, Hufflepuff, and LeFay, which somehow had their magic vanish to come back with Lily.

And by Magical Inheritance, she became the Heir of Merlin himself!

Then there were the wills of Crouch, Gibbon, Lowe, Moody, Karkaoff, Dumbledore and even Snape of all people saying she inherits their vaults and properties since they were the only heirs left, or their children turned traitor or died in the war. Others includes Slughorn who was leaving everything to Lady Potter when it's his time.

Then there was the issue of what was before her.

The Elder Wand, which she thought she snapped, came back in one piece along with the Resurrection Stone which should have been lost in the Forbidden Forest.

From how the goblins figured, since she gathered all of the Hallows, she had become the True Mistress of Death.

As well as the artifacts of the Four Founders, 3 which she cleansed from Voldemort's Dark magic and had decided to restore along with their wands which now answered to her.

Over a span of five years, Zephyranth had been busy with hunting any remaining Death Eaters or their children or rather they tried to come after her for vengeance. But she would stand victorious as her enemies were sent to Azkaban without a galleon to their name.

As a result, her enemies would call her 'Mammon's Collector'.

But the goblins were more than happy to strip the losers of their wealth as they no longer had to play nice with pompous pure blood supremacists.

Zephyranth was currently lounging after refusing another wave of suitors after her money or status.

Tired from work and such, she thought to take a vacation.

She looked over popular attractions and found one where there was an island with an amusement park accessible to Italians. Thankfully, she had a connection with the Italian Branch of Magic to get her there.

Unknown to her what she would encounter or the world she would enter.
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She was impressed by the look of Mafia Land, which was a strange name to her, guessing its a play on words for the Mafia and such. She decided to take a walk along the beach for starters.

Taking a breath, she went to a personal cabana she rented and settled to read while listening to the waves of the ocean.

Unknown to her, a wave of energy from her began to wash over the island. And certain people felt it as well.
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A scientist was going over notes in his hotel room when he heard a call of a Sky, only this one was unfamiliar and they didn't seem to look for harmony but it was strong and unattached.
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A martial artist paused in his walk on the mountain to hear the unfamiliar call but he knew it was strong. And Pure. Untainted even.
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A military blond paused in polishing his gun as his instructor did. "Did you feel that? Kora."

"Yeah. This is when someone's flame awakens. But its strong. Unbelievably strong. Perhaps more than us." A blue haired woman said.

"Did a new Sky awakened or something, kora?"

"We'll find out. Beside we should get them to control it. Otherwise other unattached flame users will get flame drunk if they make contact. Any Sky with this much power can harmonize with a number of lesser users quickly."
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An esper paused in counting money looking out the window.

"Mou...whoever can't control this will be paying a fine."
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A certain hitman had been dragging a certain Stuntman around as Decimo had been able to arrange an alliance with the Calcassa to clear up their old system.

That was when they felt the wave of energy as well.

"Senpai? Was that...?"

"A Sky is on the island, a powerful one. But this one is unfamiliar." The man in a fedora said as he walked to find this unknown Sky.
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Who should Zephyranth meet on Mafia Land first?
By the way, this is at least ten years after Voldemort dies for good and a year after Tsuna becomes Decimo and the Arcobaleno are free from their curse and back in their adult bodies.
Yuni has her own guardians and the Arcobaleno never really harmonized with her, just mostly protect her out of obligation. They hold no grudge on her although her grandmother got them Cursed in the first place.