Akina started to rebel against her ultra-conservative family when she was a teenager and ran away to join a motorbike gang in Tokyo. During that first escape, she discovered that her father was involved in the covert and deadly Fuchi-no-Kuroi (Dark Pool) Ninja Clan. She was grabbed by ninjas and dragged back kicking and screaming to lay before her furious father.

The next month she escaped again, but only got so far as the bus stop when she was grabbed by ninjas again. Her father allocated two bodyguards to her and the orders that she never be allowed to be alone. She felt trapped and considered killing herself many times, but one day while she sat on the floor of a restroom where she could get some refuge from her guards, she started to fade into a shadow against the wall. At first she was horrified and tried to scream out for help. The ninja bodyguards wasted no time in busting down the door, but Akina had slipped through the cracks of the small window and was gone, up and over the rooftops of the commercial district.

Her father suspected kidnapping but when she returned home the next night he realised she had eluded her guards. Akina told him that she refused to be a part of his charade, that he could carry on his life of money and power, without her. He demanded that she stay and attempted to apprehend her, but she simply slipped away out of his grasp.

She still remembers the look on his face when she flattened herself and shrunk away from him. The horror and the disappointment were priceless.

Akina moved to Shanghai in China and studied art at a university using her trust account which she had transferred across to a secure location before leaving her father. She enjoyed the freedom she had earned and flaunted her money and her daredevil attitude. She moved quickly from city to city, first to escape the Chinese government's attention, and then because she could. She made her way to San Francisco where she made millions in the art world as well as some serious burglary on the side. In San Francisco she was again approached by the Fuchi-no-Kuroi Ninja Clan, but this time it was to tell her that her father had died of a heart attack.

Akina felt no remorse and turned her back on the Clan, although they quickly let her know that such an action was not available to her. They had learned of her powers and her ability as a thief and they had decided to impress upon her the need to join the Clan. They saw it as her destiny and perhaps payment for the investment they had made in her father.

A battle broke out which carried into a restaurant. Akina was outclassed, but her desperate plight drew the attention of Nepatiabet who was eating a meal. At first the daughter of the Pharaoh tried to ignore the melee, but there was something about the Japanese girl's guts and determination which made Nepatiabet stand up from her table and single-handedly take on the ninjas - and in doing so, showing them that she knew the Ninjitsu moves better than they did.

Akina and Nepatiabet struck it off on that night and she joined the First Strike team mostly because she wanted to continue her life without having to hide from the Fuchi-no-Kuroi, but also because of the growing attraction to Nepatiabet. She has been with the team for over a year and has shown herself to be a versatile and ruthless addition. She has since discarded any interest in concealing her identity. Her father is dead and his empire is crumbling. She is now more powerful and famous than he ever was (at least in her own mind).

Akina is a spoiled rich girl who has never had to do anything she didn't want, apart from the time she was held a virtual prisoner by her father, but that only lasted a few days at most. She immerses herself in sensations and never appears uncertain in anything. She can be bungie jumping in the morning, eat blood pudding for lunch, and then wrestle crocodiles in the afternoon.

She has an addiction to rave parties, as well, and can totally lose herself in them: something which drives Nepatiabet crazy, but Akina refuses to compromise. It appears at times that Akina is using Nepatiabet, but being manipulative is part of her personality and upbringing, and her feelings for Beth are as genuine as she has ever experienced before.

""Let me sink my nails into that one!"

Sukoshi is able to flatten her body out to such an extent that she nearly becomes two-dimensional. From the sides she appears as an incredibly thin line and is very difficult to perceive, while at the front and back she appears to be a flattened version of herself. While in this form she is very difficult to hit and is able to slip through the smallest crack in walls or under doors. She is able to glide across the air and has some control over the trajectory. She has shown some ability to change shape when flattened so that she can be rolled up or folded into a variety of origami-like shapes, although these are mostly done for party tricks.

The most dangerous aspect of this flattened form is her ability to slice through most materials because her form is so very thin. She generally uses her fingers to slash at opponents although she is also quite adept at martial arts in her normal form.

Like all members of First Strike she wears a communicator which has a standard channel and a encrypted one.  Since joining First Strike she has also taken to carrying a pistol.  It seems to make things simpler in her mind.

When she is in her flattened form, Sukoshi appears almost two-dimensional and is virtually invisible on either side, while appearing quite flat at the front and back. She wears a red and white costume with a bare midriff and knee-high boots. Her hair is shoulder-length and held back by a white headband. She never conceals her identity and is very open with everything about her, whether it be her high society pedigree, her powers or her homosexuality. She never holds back.

Out of costume Sukoshi could be wearing anything. When she goes clubbing she generally wears as little as possible, but always something new and fashionable (and usually stolen).