Name: Flandre Scarlet
Age: 495
Gender: Female
Race: Vampire
Health: 1000000
Abilities: Flandre has the ability to manipulate the "Eye" of objects. This "Eye" is not a literal eye but instead the force that holds objects together, and as a consequence this ability allows her to annihilate anything she wants. Additionally, she posseses extremely powerful Danmaku powers, and fighting with these is her idea of fun.
Strengths: Being a vampire, Flandre is strong enough to crush boulders and faster than the eye can see. Additionally, being a vampire, she has insane regenerative powers, letting her grow back everything as long as her head is intact.
Weaknesses: Flandre, being a vampire, is weakened by sunlight. Additionally, she is weak to flowing water. And of course, silver is always effective. Another thing to note is that Flandre is bound by Spell Card rules, meaning her Danmaku power is limited, and she willingly fights without her full power as she considers it more a game that an actual fight.
Equipment: Flandre, of course, has her Spell Cards, which allow her to perform specific moves. She has ten Spell Cards, each with a different ability and pattern of bullets. Bullets fired from her own spell cards do nothing to her.

Taboo "Cranberry Trap": Flandre summons four pentagram-like turrets around the edge of the arena that fire balls of energy towards the middle, as well as some aimed at her enemy.

Taboo "Lævateinn": Flandre summons a giant fiery sword, swinging it and leaving behind trails of fire.

Taboo "Four of a Kind": Flandre summons three clones of herself, each firing their own bullet patterns.

Taboo "Kagome, Kagome": Flandre creates cages of energy bullets and sends giant energy shots through them, turning the "walls" of the cages into bullets.

Taboo "Maze of Love": Flandre creates a spiralling maze of bullets that forces the opponent to weave through small gaps.

Forbidden Barrage "Starbow Break": Flandre fires barrages of rainbow-colored bullets.

Forbidden Barrage "Catadioptric": Flandre fires large blue balls of energy that bounce off the walls of the arena and fire smaller blue shots.

Forbidden Barrage "Clock that Ticks Away the Past": Flandre creates two giant spinning gears of energy while firing off a massive barrage of energy bullets.

Secret Barrage "And Then Will There Be None?": Flandre turns invisible and barrages of energy bullets fire from every direction.
Q.E.D. "Ripples of 495 Years": Flandre unleashes her full Danmaku powers, shooting massive barrages of deadly bullets that bounce off the walls of the arena.

approved both of you

Name: Hayli
Age: 18
Gender: Female
Appearance: She's around 1.70 metres tall, slim, blond hair, and green eyes.
Race: Human
Health: 1
Abilities: Getting hit
Strengths: Literally none
Weaknesses: Just one hit will kill her. Isn't that weakness enough for you!? You monster!
Equipment: She has literally no equipment that is useful for battling.

Name: Mister Johnson, The Soldier

Age: 7

Gender: Mannequin

Appearance: A wooden mannequin standing at 1.8 meters, and made out of polished mahogany. The body is more or less male minus genitalia, and its joints are noticeably obvious with a sort of ball socket. Clothed in the iconic red uniform of the British at the time of the American Revolution, and his featureless face seeming to radiate a sort of pride.

Race: Automaton

Health: 1350

Abilities: A skilled sharpshooter, and the ability to see 360°, hear, and smell without the corresponding organ. Also able to take out and place objects within his own personal hammer space instantly

Strengths: Electrical attacks do not damage him nearly as badly as it does biological targets and he is unaffected by time, fatigue, or disease. Additionally, he is able to lift one metric ton with relative ease. He also has an increased reaction speed and reflexes. 

Weaknesses: Fire and water are quite devastating when used against him, the latter causing his joints to swell and him to slow. Ice and smashing weapons are similarly effective.

Equipment: A flintlock musket, rifling and a skilled creator making it accurate for its crudeness.
A flintlock pistol
40 Musket balls & 40 Paper cartridges of gunpowder within a leather satchel
1 Bayonet
1 Lighter & 6 Era-Accurate Incendiary Grenades
1 Officer's Saber made of tempered steel

Blunderbuss & 2 lb of screws and lead balls

We'd like to join their fight, please.

Flandre entered the sandy arena, hovering slightly over the ground and clutching a teddy bear. She looked around the arena and, seeing some kind of mannequin in the opposite corner, smiled. She fired off a couple weak shots towards it.