The Suke Suke no Mi is a Paramecia-type Devil Fruit that gives its user the ability to turn themselves and whatever they touch (living or nonliving) invisible, making them a Clear Human (透明人間,Tōmei Ningen?).
Sukesuke (透け透け,Sukesuke?) is Japanese for "see-through" or "sheer" (often used in regards to clothing). It comes from suku (透く,suku?), which means "to be transparent".
In a nod to the perverseness of the fruit's initial user, its name may also play on sukebe (助け平,sukebe?), which means "lewdness/lewd person".
"Suke" is also an anagram of kesu (消す,kesu?), which means "to erase" (as in: the user's visual appearance).
In the Viz manga and FUNimation dub, it is called the Clear-Clear Fruit.
Strengths and Weaknesses
The Suke Suke no Mi's primary ability is to make the user invisible, but the user can also selectively turn anything they are in contact with invisible as well. Because of this ability, the user can spy on conversations and people without being detected as well as abduct people with no chance of being tracked. This also allows them to carry hidden weapons to attack with such as hand-strapped bazookas. Even an entire ship (though a small one) has been made invisible in order to make a concealed getaway.
The main flaw of this ability is that the user's presence can be briefly revealed if they are covered by something, such as water, salt, or blood, giving their opponent a chance to notice them. If the user gets too close to an opponent, they might get struck if the opponent gets in a lucky hit. The opponent may resort to other senses (such as hearing or smelling) in order to detect the invisible user. Additionally, invisible objects will instantly become visible once they are no longer in contact with the user. The fruit's ability will also wear off for a few seconds if the user is hit by a powerful blow, presumably due to a loss of focus. Other than that, the user suffers from the standard Devil Fruit weaknesses.
Absalom uses the ability to turn invisible to aid him in combat; he claimed that his powers only serve as a supplementary to the modifications made to his body. He also uses his invisibility to peep on and sexually harass women as well as getting insight as a reporter.
Skating (透明化,Sukētingu?, literally meaning "Becoming Transparent"): Absalom turns his entire body invisible. In combat, this is primarily used as in preparation for performing other techniques. This technique was first used against several of the Straw Hats on the Thousand Sunny, but was first named against Sanji. The name of this technique is a pun on the term "Suke". This is called Invisiskating in the Viz Manga and FUNimation dub.
Shisha no Te (死者の手,Shisha no Te?, literally meaning "Dead Person's Hand"): Absalom aims one or both of his arms at an enemy and fires the bazookas on his arms; however, since the bazookas and their ammunition are invisible, the resulting attack appears to be some sort of concussive blast as the ammunition flies forward without being seen. This technique was first used against Sanji's zombie, Inuppe, but was named and explained during Absalom's battle against Sanji. In the Viz Manga and FUNimation dub, this is called Hands of the Dead.
Kaijin no Te (怪人の手,Kaijin no Te?, literally meaning "Mysterious Person's Hands"): While invisible, Absalom punches his opponent multiple times. This was first used against Sanji. In the Viz Manga and FUNimation dub, this is called Mystery Man Handler, doubling as a pun referring to his earlier molestations of Robin and Nami.
Kaijin no Ashi (怪人の足,Kaijin no Ashi?, literally meaning "Mysterious Person's Legs"): While invisible, Absalom kicks his opponent multiple times. This was first used against Sanji. In the Viz Manga and FUNimation dub, this is called Mystery Man Kicker.
Like Absalom, Shiryu also uses this fruit in combat. By turning himself and his sword invisible, he is able to cut opponents without being spotted.
According to Oda, he would use it to spy in the women’s bath.
At some point in the past, Absalom found the Suke Suke no Mi and ate it. However, he then encountered the Blackbeard Pirates, who then killed him so that Shiryu can take it from him.
Sanji claimed that he wanted to eat the Suke Suke no Mi because he wanted to be a super hero (though in reality, he just wanted to peek at women while they are bathing). Sanji hated Absalom even more because he ate the Suke Suke no Mi. However, though this was the only Devil Fruit that Sanji was ever interested in, he lost interest in the fruit after his fight with Absalom, deciding that he shall just have to peek on women anyway without it.
Sanji would later obtain the power of invisibility through his raid suit.
In Vol. 2 of One Piece novel A, Thatch claimed that Marshall D. Teach wanted to eat the Suke Suke no Mi, unaware that Teach really wanted the Yami Yami no Mi. However, he was ultimately right to a degree, as the Blackbeard Pirates would go on to steal the Suke Suke no Mi and have one of their members eat it. Vol. 2 of novel A came out five months before Shiryu eating the fruit was revealed to have happened in the manga.