After receiving advices from some readers, who I'm thankful to for their help, I decided to change some details in the flashback and tone down Jin's ability to remove him definitely from the Mary Sue's territory, something many feared he was slipping into.

Personal Details

Name: Jin Araya

Nicknames: "Konoha's Crazy Destroyer", "Red-Eyes Electrocuter", "Human Weapon of Mass Destruction", "Thief with a Thousand Faces"

Symbol: Yellow Leaf of Konoha

Gender: Male

Race: Shinobi (Chakra-generating Human)

Age: 17

Height: 171 cm

Weight: 55 kg

Birthday: 14/4

BloodType: O

Clan: Unaffiliated

Bloodline: No confirmed bloodline

Elemental affinity: Lightning and Water

Father: Kirihito Araya

Mother: Higanbana Kurenai

Special traits: Chakra reserves comparable to a Jounin. Acquired after being subjected to one of Orochimaru's experiments aimed to improve chakra coils.

Appearance: Hyde from "Under Night in-Birth" minus the sword, complete with black uniform and belts. He has a weapons pouch on his left thigh and he wears his Konoha's headband around his right arm.

Voice Actor: Ryohei Kimura, best known for giving voice to: Roche from "Neo Angelique ~Abyss", Akira Takizawa from "Eden of the East", Hinata Hideki from "Angel Beats!", Brave from "Yu-Gi-Oh! 5D's", Judal from "Magi: The Labyrinth of Magic", L-Elf Karlstein from "Valvrave the Liberator" and, as expected, Hyde from "Under Night In-Birth".

Normal Theme: "Erudite Eye" (Under Night In-Birth Exe Late

Battle Theme: "Rebirth The Edge" (Sengoku Rance OST)

Traits:

-Motion sickness: most severe. He becames sick from riding on any form of transportation, even when using the Hiraishin no Jutsu.
-Rotten Luck: weird and improbable things tend to frequently happen to and around him. And yet he always manages to survive, only to experience even worse events later.
-Fuinjutsu Prodigy: a talent bordering on the unreal in the art of Seals. Sadly it doesn't extend to other skills.
-Operation Scar: a big scar on his chest that started below the neck and ended before touching the navel. It still hurts from time to time.
-Rampaging Paranoia: every self-respecting ninja has it. Sadly it only keeps you alive, not happy.
-Musical Talent: he is good at playing an electric guitar. His singing prowess are worse though.

Parameter Rankings:

-Strength: average Chuunin level
-Agility: above average Chuunin level
-Stamina: average Chuunin level
-Precision: above average Chuunin level
-Reflexes: average Chuunin level
-Chakra Reserves: average Jounin level
-Chakra Control: above average Chuunin level

Skill Rankings:

-Genjutsu: below average Chuunin level
-Taijutsu: below average Chuunin level
-Ninjutsu: average Chuunin level
-Kenjutsu: above average Genin level
-Fuinjutsu: Seal Master, Legendary level beyond even a Kage
-Iryojutsu: below average Chuunin level
-Stealth: above average Chuunin level
-Tracking: average Chuunin level

Weapons:

-Standard Kunai
-Flying Thunder God Kunai
-Steel-reinforced guitar case
-"Ibaraki Doji": a black and yellow striped, seven string V-electric guitar with a straight headstock. What makes it different from a normal instrument, aside from being entirely made of metal and being a little thicker than a normal guitar, is the body: instead of a regular 'V' shape it has not two, but four protrusions forming a 'W'. The external ones also has a series of bolt heads popping up from the surface. To the right of the bridge there are the normal three knobs for the volume, but to the left there are another three knobs. Who look similar, but have an entirely different purpose.
-Modes:
-Electric Guitar
-Twin Machine Guns
-Double-Barreled Gatlin Gun
-(?)

Technique Library:

Hiraishin no Jutsu (Flying Thunder God Technique)

Memory Absorbing Seal

Lightning Release: Lightning Clone Technique

Basic academy techniques: Body Replacement (Kawarimi), Clone (Bunshin), Transformation (Henge)