I have two souls in one body, so I'll note the differences between them.
Name: Main personality- Trevor/Second personality- Francis/ They call themselves Trances.
Age: Looks about twenty.

Appearance: See avatar.
Gender: Male
Race: Human

Which hand do you use: Trevor is right-handed, while Francis is left-handed.
Height: 5'11"

Weight: 180 lbs

Occupation: They are ex-shinigami, now they are bodyguards for hire.

Weaponry: Umbrella.

Strengths: Trevor is an expert in kidou (attacks using spiritual energy), while Francis takes over when they release their zanpakuto and specializes in unarmed combat. Both of them excel in speed.

Weaknesses: When they go bankai, both souls fight over the body, so they tend to end up arguing with each other, but when they do manage to synchronize they're a force to be reckoned with.

Abilities: Can fire offensive energy and flash step (cover ground quickly).

Relationships: None for the moment.

Parents: Unknown

Zanpakuto- Name: Hogosha

Appearance: It appears to be nothing but a closed umbrella, but it is a slender hidden blade that can be drawn by grabbing the bottom of the umbrella and twisting it left.

Released form: In order to release their zanpakuto they most open the umbrella and state: Rise and hide, Hogosha. It's released power gives it the ability to absorb any attack that lands on it, so long as it is being twirled clockwise. When enough power has been gathered in Hogosha, it can spread into a dome with a twenty-foot radius. To activate this ability Hogosha must be spun counter-clockwise as well as reciting: Hogosha, saraundo.

Bankai: For them to activate bankai, they have to draw their blade and stab themselves anywhere on their body. Rather than cutting them both the blade and umbrella seep into their body and takes on the form of a large white coat. The coats ability is that any blow that lands on it is immediately absorbed of all power and impact, while any blow it lands is magnified. The weakness to this is that the coat does not cover Trances' face or hands, forcing them to not use punches.

Character Traits: Trevor is more aggressive then Francis and has a more informal way of going about conversations. If he meets someone that doesn't introduce themselves then he'll make an offensive nickname for them, until their actual name is revealed to him by them. Francis tends to be more logical and reserved, although when he meets a guy he finds attractive he blushes frequently around them and tries to talk to them as much as possible.

Brief Background: Trevor and Francis were twin shinigami. They were used in an experiment to see what would happen if shinigami souls were used to form artificial souls. Francis was forced into pill form and then was driven into Trevor while he was in his gigai(physical body). The result was that they were now trapped in Trevor's gigai, but it didn't suppress his shinigami abilities and Francis' zanpakuto materialized with it. They were discovered by Captain Yamamoto and since research of that nature was prohibited, were sentenced to death. They managed to escape due to some well placed connections and are now in hiding in the real world.