Neon

Neon is the captain of Uruha Oto (Sound) and one of the two Jyushinshuu female members, including herslef and Mikoto. In strength, she is the 8th strongest next to Noroi, Kai, Raiha, Joker, Rasen, and Meguri Kyōza In raw power. 

Source: http://flameofrecca.wikia.com/wiki/Neon

Appearance

Neon is a slender, but cirvaceous and attractive woman. She has multi colored hair which is mainly black, but with two red streaks in it. She is also fairly busty. Her outfit is fairly revealing, consisting of one piece outfit closed at her waist by a belt and opening again under it, falling down to her ankles. A musical note is adorned at the bottom, signifying her affiliation to the sound element. The crystal for her madogu Fukyo Waon was placed on her right breast before it shattered.

Personality

Neon's most defining trait is her loyalty to Kurei. He won her respect and adoration after he took her and her sisters in as maids after they had no place to go. She is also one of the few who have seen past his heartless persona and have seen who he really is. She is quick to defend Kurei from any threat, whether it be to his person, or even verbal abuse, and can be merciless to her enemies. She is also quite perceptive and convincing, as she lured Recca and Tokiya into battle together after figuing out that they were not on the best terms at the moment. Neon's loyalty also did not only extend to Kurei, she was implied to be very close friends with Jisho and Raiha, two of whom made a blood pact with her to protect Kurei.

Part in Story

She and her sisters/teammates Miki and Aki were taken in by Kurei as maids when they had nowhere else to go, and it is because of the kindness he showed (and his devotion to Kurenai) that Neon pledges her allegiance to him. She kills Genjuro after Uruha Maboroshī lost to the Hokage, only to encounter him again at the latter part of the manga to truly kill him. Neon has the innate ability to create force fields. She wields the madōgu Fukyō Waon, an orb that manipulates sound waves which she utilized with her flute, but the orb was destroyed by Tokiya and saved Recca's Madoka. In the latter part of the manga, she returns to the Ura Butō Satsujin arena's ruins to claim Jisho's Jisōto.
Later, after Kurei's defeat in the hands of Recca, she goes searching for him after he disappears from the arena. Although she found him, he was being attacked by Mori Koran's allies, Renge and Mokuren. To save him, she pushes themselves off the cliff and into the water below, where they drifted over to an abandoned mansion, where she took care of him. However, the same day the Kurei woke up, a man named Ma came to kill him, injuring Neon in the process. This made Kurei extremely angry, and he burned Ma to ashes. He took the unconscious Neon over to a hospital, where he left her.

Abilities

• Fukyō Waon (不狂和音 Dissonance?) - An orb madōgu that can store, amplify, and redirect sound waves to cut things, crush them, or cause explosions. It has the symbol sound (音 oto?) written on it. Neon of Uruha Oto uses it to turn her flute into a deadly weapon. Fukyō Waon can also store huge amounts of energy to the extent of infinity which can be used to do a very powerful self-destruct attack. However, while saving her, Recca destroys it. The attacks Neon used with it are:
• Quartet - A straightforward attack.

Neon using Quartet on Genjuro

• Prelude - An attack that moves in an arc.

Neon attacking with prelude

Prelude in the anime.

• Concerto - An attack that bounces off Miki's Yamabiko. Usually used when an opponent dodges one of Neon's straightforward attacks as a surprise attack.

Concerto bouncing off Miki

• Rhapsody - An attack that causes big explosion to the ground by releasing a bomb like attack.

Attacking with Rhapsody

Rhapsody's explosion

• Serenade - A straightforward attack using three notes.

Neon using serenade

• Fugue - An energy blast attack that spreads out to attack wider area.

Using Fugue

• Requiem - An attack that unleashes all of the vast energy stored in the Fukyō Waon. It's designed to kill the attacker, the victim, and anyone within the general vicinity. This attack, stated by Neon was meant to be powerful enough to not only destroy her, as well as anyone in the area, but the entire Ura Butō Satsujin stadium, making it a very wide radius and destructive attack at it's maximum. However, it takes a while to gather the necessary energy.

Neon attacking with Requiem

In addition, she has the initiate psychic ability to create force fields. Her barriers are assumed to be quite powerful, as she was confident it would hold up under an attack that was meant to destroy and entire building. She is a master swordsman; as such, she is able to use Jisōtō easily.