Ice

Ice is an Akuma that appeared in the Rewinding Town to help Road Kamelot find Miranda Lotto's Innocence.

Appearance
Ice stands on two bulky, arm-like appendages and has no body below his torso, a key occupying the space where his legs should be. He has long hair with some pulled into a curled ponytail on the top of his head, and a wide smile filled with crooked teeth. When his powers a fully released, his "Ice Fire" makes his entire body burst into flames.

He is briefly shown in human form, in which he has long hair pulled back into a ponytail, a brown jacket and a hat.

Personality
Like all Akuma, Ice is bloodthirsty, but he is also shown to be a little simpleminded, playing "Rock, Paper, Scissors" with his comrades to decide how to kill Allen. He was shown to be terrified when Road gave him the order to self-destruct, though he obeyed anyway, having no choice. As he died, his soul reached out to Allen, begging for help.

Rewinding Town arc
Ice is first seen in the cafe where Allen Walker and Lenalee Lee stop to eat while they look for Miranda Lotto, Ice and his companions Kazekiri and Pang not revealing themselves until Miranda has joined Allen and Lenalee at their table. As Lenalee flees with Miranda, Allen stays behind to fight the three Akuma, Ice first burning Allen with his Ice Fire, and then getting into a "Rock, Paper, Scissors" match with Kazekiri and Pang to decide if they will slice Allen, make him rot, or melt his brain.

When Allen opens fire on them with his Innocence, not allowing them to finish their game, the three become incensed and make to attack him again, only to be stopped by Road Kamelot forming a telepathic link with them and ordering them to come back to her. The three immediately flee, leaving Allen to wonder what had happened.

Later, after Allen has gotten a job with Miranda in his and Lenalee's plan to improve her mood so her Innocence will release its hold on the town, Ice appears in his human form and steals the money Miranda has been collecting from selling tickets, leading Lenalee and Allen away from Miranda and ambushing them in an alley.

Kazekiri and Pang join him not long after and they fight, and after Allen is seriously injured by Ice, Lenalee is knocked out not long after. When Allen regains consciousness, Ice and Kazekiri are helping Road dress Lenalee, Ice barking at Allen about how he addresses Road's "doll" when Allen calls out to Lenalee.

When Allen, after being taunted by Road, manages to free himself and prepares to attack her, Ice throws himself between Road and Allen, along with Kazekiri and Pang, the three overwhelming him again. Then, when Road tries to kill Miranda, Allen throws himself between Miranda and Road's attack and is injured heavily, and the stress of having the three Akuma corner her while she cradles Allen's prone body leads to Miranda managing to activate her Innocence.

While Ice inspects the dome that has formed around Allen and Miranda, one of his arms is sliced off by Allen's Innocence, which has recovered thanks to Miranda's Time Record removing the "time" in which it had been damaged and "healing" it. With Allen and Miranda, and now Lenalee, who Allen had grabbed, safe in Miranda's dome of time, Ice attempts to use his Ice Fire on the dome, only for Lenalee to use her Dark Boots to throw an attack back at him. Allen and Lenalee then emerge from Miranda's dome and prepare to attack Road, making Ice, Kazekiri and Pang fall into formation around her.

Suddenly inspired to taunt Allen, Road orders Ice to self-destruct, making her companion, Lero start a timer. Ice begins to beg for his life, but his cries are ignored, and even though Allen attempts to destroy Ice before Lero's timer runs out, Ice explodes, and his soul is destroyed.

Powers and Abilities
Ice Fire: Ice's Dark Matter allows him to produce flames of ice that are "hotter than fire" with the temperature averaging at below one hundred Fahrenheit, which causes the flesh of the target to burn and rot. When Ice has his powers fully invoked, his Ice Fire engulfs his body completely, making touching him dangerous. When not hitting live targets, Ice's Ice Fire coats everything it touches in ice.

Trivia

 * This Akuma was originally unnamed in the manga version. "Ice" is the name given to the character in the anime version.