I am Deidara
I (デイダラ, Deidara?) am a missing-nin from
Iwagakure and the partner of Tobi. I refer to My ninjutsu as art,
believing each bomb I make to be such works. I refer to style as
superflat (the word itself used to refer to certain types of manga),
and claims pop is dead. One of Deidara's catchphrases, "Art is a
blast" (or variations therein), was originally coined by famous
Japanese abstract artist Tarō Okamoto. Deidara is very proud of
his art, to the point that he is simply unwilling to accept that
anything could defeat it, leading to frequent overconfidence in
battle. Deidara also has a habit of ending his sentences with a
mumble/grunt, usually transcribed as un or mmm, in the same way
Naruto ends most of his sentences with -ttebayo. Deidara has become
the most popular member of Akatsuki among fans in Japan. In the most
recent character popularity poll, Deidara ranked in third place, even
higher than Naruto Uzumaki.

In battle, Deidara uses special mouths in the palm of each hand to
create Exploding Clay (起爆粘土, Kibaku
Nendo?). As the name suggests he can make the clay explode using the
command "detonate" (喝, Katsu?). To give the clay its explosive
properties, Deidara must infuse his chakra with it; the more chakra he
adds the stronger the blast. Deidara can shape this clay into a number
of forms for a variety of purposes, be it creatures that can be used
for flight or sneak attacks, copies of himself to be used as a
distraction, or weapon variants such as mines. Some clay forms even
receive a ranking system from Deidara much like that of C-4. Many of
the clay creations he makes he refers to as "C1", and their explosive
power is roughly equivalent to that of a hand grenade. "C2" is his
title for a large clay dragon that uses the clay from its tail to
shoot smaller explosives at opponent. His "C3", while never actually
seen formed, is an immobile clay statue that is used like a bomb, and
upon making contact with the ground has the potential to decimate an
entire village. His final and strongest, "C4", is created by eating
clay with his mouth and then spitting out a large copy of itself.
Once the clone detonates it release a number of microscopic bombs
over a large area that enter an opponent's body through their nasal
passages and, upon detonating, cause the target to dissolve into
dust. As a last resort Deidara has an additional, unranked, mouth on
his chest that, once being unsealed and provided with clay, turns
himself into a living bomb that destroys everything in a 10 kilometer
radius at the cost of his life. In addition to his explosive clay,
Deidara wears a scope on his left eye for long-range observation, and
he has trained the eye itself to dispel genjutsu.

Before joining Akatsuki, Deidara was a terrorist bomber for hire,
seeing it as an opportunity to use his "art" on a regular basis. He
was involuntarily recruited by Itachi under the orders of the leader.
While he becomes accustomed to Akatsuki, he continually holds a grudge
against Itachi and longs to defeat him to prove himself. After
joining, Deidara is partnered with Sasori, who he refers to as Master
Sasori (サソリの旦那, Sasori no
Danna?). Deidara respects Sasori as a stronger fighter and great
artist, thought he two disagree on what fine art is. Deidara holds
that art is transient, departing quickly. Sasori believed that fine
art is something wonderful that's left long into the future. This
reflects their individual natures (Deidara makes clay sculptures that
explode, Sasori makes long-lasting puppets out of humans). After
Sasori's death, Tobi is assigned as Deidara's new partner. Deidara
gets impatient with Tobi fairly easily, since Tobi rarely pays
attention to what he is saying. Tobi's inattentiveness often results
in Deidara attacking him in some way, either with his exploding clay
or an attempt to suffocate him. Despite this hostile relationship he
has with Tobi, Deidara has formed a student-teacher connection with
him; Tobi even refers to him as "senpai". Once in battle the two
prove able to work well together, with Tobi doing Deidara's bidding
and Deidara using caution when his exploding clay gets too close to
Tobi. Prior to blowing himself up, he apologizes to Tobi for what he
is about to do.

After hearing of Orochimaru's death at the hands of Sasuke Uchiha,
Deidara, angry that someone other than himself killed Orochimaru,
sets out with Tobi to seek revenge against Sasuke. Upon finding
Sasuke, Deidara quickly starts to fight him, though Sasuke's
abilities and Sharingan allow him to avoid the worst of Deidara's
clay explosions. Enraged that Sasuke, like Itachi many years earlier,
is using his Sharingan to defeat him, Deidara attempts to use his C4
explosives to kill him and prove that his art is better than that of
the Sharingan's. Sasuke once again avoids the blasts, and Deidara is
left out of chakra and thus unable to create more explosives. In a
last ditch effort to kill Sasuke, Deidara uses the mouth in his chest
to turn himself into a bomb in the hopes that he can take Sasuke with
him. His effort proves unsuccessful, and Akatsuki mourns his loss.