Sen'i Sen'i no Mi

The Sen'i Sen'i no Mi (ひらがな) is a Paramecia type Devil Fruit, with which the user is granted the ability to emit and control spike like fibres from their own body. Sen'i coming directly from the Japanese for Fibre. In both Viz Manga, and the FUNimation dub, it is called the Fibre-Fibre Fruit. The fruit originated on a small island in North Blue, where it was found as treasure by some pirates who later lost it in a local town. Where it was discovered by a young boy who proceeded to eat it. The boy being the future captain of the Blue Haired Pirates, Johnathan 'Spike' Avery.

Appearance
The fruit is spherical with two pointed ends with a deep blue colour, the fruit also has clusters of black protusion very similar to ones that it grants its user the power to create. The fruit has no stem and features a sole spiral on the top pointed end.

Weaknesses
The user suffers from the standard weaknesses of being a devil fruit user, as well as suffering as a ranged combatant when put under certain circumstances. Such as his battle with Trafalgar Law where he had significant trouble with tackling Law after Avery had attempted to defeat Law by using Blue 7 in conjunction with Sen'i Sutaa no Sutoraiki. (ひらスターがストライキ). Only to be bested by Law using Shambles to cut Avery and his crew members up, being just saved as an explosion caused by the Marines launched both himself and Law out of the projected Room allowing him to return to normal.

Devil Fruit Powers
Johnathan 'Spike' Avery has developed a number of techniques that he uses for his devil fruit and his fighting prowess is noted in the North Blue due to his battles with Trafalgar Law and his crew. He is fairly strategic when it comes to fighting and always likes to keep well informed from his crew, particularly on current Pirates roaming the North Blue looking to make a name for themselves so that If they were to cross paths on the open seas then he would have prior knowledge before the encounter.

Sen'igan (ひらガン, literally meaning: Fibre Gun).

'''Gurasu Fuxaibaa no Hanten. '(''グラスファイバの斑点, literally meaning: Fibreglass Flecks).'

Sen'ittoryu
Avery is proficient with his own signature sword style, Sen'ittoryu (ひら一刀流, literally meaning: Fibre One Sword Style). His ability and technique with the sword were good when he was a child as he was trained regularly by his grandfather who owned the only sword shop on his home island. The techniques that he uses are specific to his style because of the combination with his devil fruit power.

'''Sen'i Sutaa no Sutoraiki. '(ひらスターがストライキ, literally meaning: Fibre Seven Star Strike).''