Senichi Enari

"Three! Investigate using futuristic technology! Deka Green!"

- Sen'ichi

Sen'ichi Enari (江成 仙一, Enari Sen'ichi) or "Sen-chan" (センちゃん), is DekaGreen (デカグリーン, Dekagurīn) of the S.P.D. and Dekarangers.

Dekaranger
Born in a poor family as one of seven siblings, he is the brains of the team with a remarkable ability to think things through. Oddly, he does his best thinking when he's upside down, calling this pose the "Thinking Pose." He has a fear of dark, enclosed spaces that was caused by an incident of falling into a well when he was younger. He was rescued by a policeman, who inspired him to work for the police department. Sen-chan usually maintains a calm, eccentric composure, but he is said to be pretty scary when he is angered. He mentions that he used to be a 'combi' with Gyoku Rou as did Jasmine and Hoji Tomasu and that they both used to argue with each other. But he forgot at first who Sen-chan was which hurt his feelings quite a bit which lead to Gyoku being punished by Umeko. Has a bit of a crush on Umeko, but never shows it outright. By Mahou Sentai Magiranger vs. Dekaranger, he and Umeko are together. However he forgot about their date and she put him in a headlock. His number is 3.

Gokaiger
A few years later, Sen-chan fought alongside not only his own team, but every single Sentai ranger in existence, against the Empire of Zangyack when it attacked the Earth in the Great Legend War. After fighting against hundreds of Gormin and their Zgormin commanders. AkaRenger noticed the fleet moving towards them, he gathered all the Rangers together and gave them the order to sacrifice their powers to wipe out the first invasion's armada. Sen-chan is one of several rangers (portrayed by a stand-in) who could be seen in the background when the Goseigers awoke after sacrificing their powers.

After the Zangyack Empire was defeated by the Gokaigers, Marvelous returned the Ranger Keys to their orginal owners. Sen'ichi and his teammates have their powers again.

Super Hero Taisen
Sen, alongside his team (DekaBreak, DekaMaster, and DekaSwan were absent), among the majority of the Super Sentai heroes, was caught up in the "Super Hero Taisen" incident which eventually resulted in the Super Sentai teams and Kamen Riders joining forces to defeat both Dai-Zangyack and Dai-Shocker.

Super Hero Taisen Z
The five Dekarangers are seen alongside the Flashmen, standing behind Space Sheriff Gavan Type G and Kamen Riders Fourze, Meteor, Decade and Super-1 as the three forces of super heroes confront Space Shocker.

Super Sentai Versus Series Theater
Sen-chan's appearances in the "Versus Series", Dekaranger vs. Abaranger and Magiranger vs. Dekaranger, are featured in the Super Sentai Versus Series Theater, hosted by the heroes of Tensou Sentai Goseiger. Agri (Gosei Black) also dresses as Sen-chan in the Dekaranger/Magiranger cosplay.

After seeing him in both Dekaranger movies, Hyde (Gosei Blue) feels suspicion of Sen-chan and his similarity towards his former Seaick partner Magis (Gosei Green) (both were played by actor Yousuke Itou).

Akibaranger
DekaGreen appears as part of the five-man Dekaranger team alongside the other two Inordinate Sentai, Dekaranger and Jetman, in Season Two's alternate take on the events of the first season. The three official Sentai come to aid the Akibarangers in the final battle with the Stema Otsu Corporation.

Kozukozu Mita cosplays as Sen in the fourth episode of Hikonin Sentai Akibaranger: Season Two.

The Dekarangers, with DekaBreak this time, later appeared with the now five official Sentai, transforming into their Ludicrous Power which combined with the others to form the Ludicrous Cannon Bazooka, which the Akibarangers used to destroy Kameari Alpaca.

Ranger Key
The DekaGreen Ranger Key (デカグリーンレンジャーキー) is Sen'ichi Enari's personal Ranger Key and what became of his powers after he along with the rest of the 34 Super Sentai sacrificed their powers to end the Great Legend War.

This key along with the majority of the Ranger Keys were collected by the Red Pirates and later used by the Gokaigers. The DekaGreen Ranger Key was mainly used by Don Dogoier (Gokai Green), who used it to fight as DekaGreen.
 * When the Gokaigers became the Dekarangers while fighting Action Commander Bongan.
 * When the Gokaigers (bar Joe) became the Dekarangers while fighting Action Commander Zodomas' Zugormin.
 * When the Gokaigers became the Dekarangers in their fight with Alienizer Buramudo.
 * When the Gokaigers became the Dekarangers while fighting Agent Abrella's Mechanoid army, acting as a diversion as Marvelous (Red Hawk) made his way to Los Dark's ghost ship.
 * Alongside Ahim (DekaPink) and Gai (DekaBreak) while fighting against Zangyack.
 * When the Gokaigers became the Dekarangers in their fight with Barbaric Officer Chirakashizky.
 * Don became DekaGreen SWAT Mode in a Super Rangers Gokai Change in the final battle with Ackdos Gill.

After Zangyack were finally defeated, the Gokaigers gave the Ranger Keys back to their rightful owners. It is presumed that Sen received his key and became DekaGreen once more.

Portrayal
Sen'ichi "Sen-chan" Enari is portrayed by Yousuke Ito (伊藤 陽佑). Ito later played Magis (Gosei Green), Hyde's partner, in Tensou Sentai Goseiger, though Magis only appeared in flashbacks and was not a member of the main cast. As a child, Sen is portrayed by Kengo Tajima (田島 健吾). As DekaGreen, his suit actor was Kōji Mimura (三村 幸司).

Dub names
In the Korean dub of Dekaranger entitled Power Rangers S.P.D., which aired in South Korea, Sen-chan is renamed Shin, while his Ranger designation is S.P.Green.