Name: Tarn
User: >>>
Gender: Mech
Color: Look at the picture(s)
Bot or Con?: Decepticon
Rank: Well, he's currently leader of the D.J.D. (Decepticon Justice Division) Which I'll talk more about later.
Personality (Well, an entire thing all about him, not just his personality xD) : Tarn is an eloquent Decepticon. He enjoys nothing more than playing beautiful music as he waxes poetic quoting "Towards Peace" and other philosophical works by Megatron. He tends to indulge these pleasures at the same time he's using his specially modulated vocal processor to cause the Decepticon Justice Division's latest transgressor's spark to self-destruct. The current leader of the D.J.D., Tarn epitomises the mentality of the team. He is beyond zealous in his devotion to Megatron's cause, going so far as to emboss the Decepticon insignia onto his own faceplate. No traitor, no coward is capable of escaping his team.
But as with many leaders, the pressures of his job have led him to fall back on addiction. Developing an obsession with transformation, he changes form constantly, to the point where he burnt through his original transformation cog long ago. Now he uses either those of the victims of the D.J.D. or cogs acquired through less direct means to acquire replacements, feeding his addiction and ensuring he can continue putting the fear into those who would dare abandon the path of the Decepticons.
Looks:

(His alt mode is in the bottom of this >>>>>)

Weapon(s): A rather modified Blaster and his servos. That's all he needs.
Defense(s): ^^^^^
Hates: Traitors, cowards, spies, etc. Autobots >__>
Likes: His team (DJD), Megatron, Decepticons (clearly.)
Other: A little more info on DJD;
The DJD consists of these four:

(And Tarn, of course.)
Their names, left to right in order:
Vos (Yes, the insanely crazy Vos that obsessed over his own hands e-e), Helex, Tesarus, and Kaon.
It's been deemed that the DJD are indeed,
scary.
Das pretty much it c:
Human you guard: AHUHUUUUU