Soma's highly-dedicated butler, Agni comes with his master to England in search of Meena. Agni is a master at Indian cooking, and has even shown some skill in landscaping (turning the bushes in the Phantomhive Manor's garden into topiary elephants, for instance). But even more impressive than his cooking skills is his martial arts ability. When he and Soma meet Ciel and Sebastian, Soma orders the butlers to fight. In a move that surprises even Sebastian, Agni proceeds to give the demon a run for his money. In battle, he attacks his enemy's marmam, or pressure points, which can result in paralysis or death. In addition, his right hand has been blessed by the goddess Kali, giving him enhanced strength.

In chapter 127 of the manga Agni was stabbed to death by an assassin, while protecting Soma.

He shielded Soma from the attacker, then managed to push Soma into a room, and by using the power of his right hand to keep the door shut he prevented the assailant from entering. when Ciel and Sebastian return to the house they find a trail of blood, leading to Agni's dead body. He stands at the door, multiple knives stuck in his back, gripping the handle. Sebastian then forcefully pulls Agni's hands and opens the door, finding Soma safe and sound. Sebastian praises Agni's qualities of a butler.
Nicknamed "Kari no Kami (Curry no Kami)" (a pun, actually)