Okay, this seems a bit complicated, but I really like the ideas you're giving, so I'm gonna do my best with this. Also, I'm putting it out there now that all the images come off of Google, so if you recognize them, it's because they're not mine. But they *do* fit the characters.
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Name: Kept secret
Alias: Raider
Age: 16

Class: Portal Gunner - Raider's knack with technology offers him a somewhat unique class that he made up on his own. Using his portal-generating device and a rapid-fire energy pistol, Raider can swarm an enemy with shots from several angles at once. Though his magic and speed are impressive, he lacks any serious physical attack or defense, meaning an enemy that can get close will cause him a very hard time. ((Unlike Peace, Raider can open several portals at the same time. However, they are only large enough for objects about the size of one's hand to fit through, so full-body teleportation still eludes him.))

Level: 19
Combat Mode: Energy Ranged/Devices

Core Ability: [i]Tech-Minded[/i] - Raider can control certain technologies with his mind alone. To do this, he has to 'tune' his mind to their wavelengths and subvert their programming with his own. While entirely tuned to the guns and portal device that he has created, other machines, depending on their complexity, can take time to attune to, and the results may not always be as expected. If anyone else is actively using the machine, or if the machine is run by AI, tuning may be impossible. He also has the ability to mentally scan any device he's attuned and understand exactly how it works and how to build it.

Weapon: [img=http://fc05.deviantart.net/fs70/f/2010/234/b/1/Custom_Heavy_Blaster_Pistol_2_by_Tenacity1.png]
An energy-firing machine pistol that can be set to single, semi, or full auto. It charges with sunlight, and can even charge from moonlight, though that takes longer. With direct exposure, ammunition is limitless. When cut off, a full charge is worth about 300 shots. He calls it "Fly-by", denoting his preferred style of hit-and-run attack. When cornered, he has a small energy blade used for self-defense, though he is not entirely skilled at using it.

Appearance: [img=http://img3.wikia.nocookie.net/__cb20110604145529/bleachfanfiction/images/a/a1/AnimeBoyRedHair.jpg]

History: Raider has always been the kind of guy to make life fun, but not take it seriously. His life's been pretty normal, all things considered. He grew up the youngest of two, with his older sister Terra watching out for him. Their personalities are direct opposites, but they love each other very deeply... though it may not look that way to outsiders. Unlike his sister, Raider has always lived life by his own rules, much to the chagrin of his parents. He uses his tech savvy not to change the world, but to play hilarious pranks on other people. When in battle, he can fight well, but it's very rare to see him act serious.
Theme Song: [youtube]rpq3BTlxFxw[/youtube]

Character Statistics:
Strength: 10
Intelligence: 16
Willpower: 12
Regeneration: 10

[b]Skills:[/b]
Skill Name: Enhanced Focus (available to all ranged classes)
Level Obtained: 10
Damage Type: none
Element Type: none
Effect: The user speeds up his brain's processing speed, causing time to appear to slow down. This allows for enhanced accuracy with rapid-fire weaponry. Lasts 1 minute. Cooldown: 5 minutes. This effect [i]must[/i] be active in order to use Portal Storm.
Range: Self

Skill Name: Portal Shot (Portal Gunner only)
Level Obtained: 10
Damage Type: Energy
Element Type: Null
Effect: The user opens a portal in front of himself and another behind his enemy. By firing into his portal, he can attack his enemy from the rear, negating most defenses. Affects one shot; on critical, three shots. Cooldown: 30 seconds.
Range: 10 meters

Skill Name: Portal Storm (Portal Gunner only)
Level Obtained: 20 (he hasn't unlocked it yet, but it's his current goal)
Damage Type: Energy
Element Type: Null
Effect: Dozens of portals are opened: one group in a horizontal line in front of the user, and the other scattered around the enemy. By firing into the portals before him, the user can unleash a devastating rain of energy from all sides. This attack cannot be guarded against except by a full-body force field or energy-resistant armor. Enhanced Focus must be active in order to use this ability. Cooldown: 1 hour.
Range: Any enemy in clear sight

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Name: -
Alias: Nightlock
Age: 18

Class: Assassin - One who fades into and out of shadows, then strikes with terrible precision. This class offers high speed and strong attack damage. However, physical defense is low, and magic offense is almost nonexistent. It relies heavily on the user's ability to dodge or deflect blows with speed, rather than sheer power.
Level: 27
Combat Mode: Physical Melee

Core Ability: [i]Fade[/i] This ability allows Nightlock to literally become one with shadows. ANY shadows. If they are connected, she can travel to any point they cover instantaneously. While faded, Nightlock is completely intangible, unable to be attacked, but also unable to interact with the world in any way. While faded, she can see what is around her, but she cannot hear it.

Weapon: Midnight Sakura
[img=http://www.thesworddepot.net/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/m/c/mc-3063.jpg]
With a mix of ninjutsu, bushido, and assassination techniques, Nightlock has developed her own unique fighting style. She wields only one katana, which she has named Midnight Sakura, in honor of her favorite flower.

Appearance: [img=http://i80.photobucket.com/albums/j177/16darkness/animeMina-1.jpg]

History: Unlike her brother, Nightlock was always the studious one. She trained hard, studied often, and did exactly as she was told for most of her life. Though her little brother Raider is often a pain, she loves him very dearly and is always looking out for him. She's also the one who usually disciplines him whenever he gets out of line. She was recruited as an assassin (they're more common than you might think, but it's more of a special class profession than a criminal activity) just before entering high school, and has trained diligently ever since. Though quiet, she enjoys spending time with those few brave enough to look past her very guarded appearance.
Theme Song: [youtube]cMc7m98eomM[/youtube]

Character Statistics:
Strength: 20 (speed)
Intelligence: 10
Willpower: 12
Regeneration: 15

[b]Skills:[/b]
Skill Name: Shadow Strike
Level Obtained: 2
Damage Type: Physical
Element Type: Dark
Effect: Anytime the user strikes while faded, the attack is treated as a Dark elemental attack. Passive ability.
Range: Melee

Skill Name: Seek Weakness
Level Obtained: 15
Damage Type: Physical
Element Type: none/Dark (if used while faded)
Effect: By carefully studying an opponent, a skilled Assassin can find and exploit their weakness. This attack nullifies armor except for full-body force fields. Cooldown: 5 minutes
Range: Melee

Skill Name: Debilitate
Level Obtained: 25
Damage Type: Physical
Element Type: none/Dark (if used while faded)
Effect: With a carefully placed strike, the Assassin cripples her opponent. Reduces target's Strength by 5. At level 50, reduces target's Strength by 10. Lasts 10 minutes. Cooldown: 15 minutes.
Range: Melee