Ghost of Mater Arc

The Ghost of Mater Arc or The Aria of the Land and the Clear Skies is the second story arc of the D.Gray-man series, which is written and illustrated by Katsura Hoshino. It focuses on Allen's mission, accompanied by Kanda, in retrieving a piece of innocence from Southern Italy. During the mission they meet a living doll, who turns out to be the Ghost of Mater, as well as a man living with the doll. They also face off against a level two Akuma, barely beating it. They eventually gain the piece of innocence, which was revealed to be inside the Ghost of Mater, and return home safely. It spans from chapter 8 until chapter 16 and from episode 3 until episode 5.

Start of Allen's First Mission
Allen and Kanda are training until a new day breaks. During lunch, Allen is overhearing a conversation between Kanda and Buzz that came out of hand. Allen stops Kanda by hurting Buzz by grabbing his arm. Allen tells Kanda that it isn't a good way of solving things. Kanda and Allen are having a hate starring moment which Reever sees them knowing that he was searching for them. Reever then tell them that they must eat their food and in 10 minutes and then must come to the command post telling them that they got a mission. Reever is trying to wake up Komui which doesn't work by shaking or smacking him. Reever then tells Komui for joke that Lenalee is going to marry which he suddenly awakens very quick. Later Komui tells Allen and Kanda that they will go on a mission as partners. Komui sees now that they can't getting along with each other, but he still go with the option that Allen and Kanda must go to Southern Italy as partners to get the Innocence quickly before it will get taken away by a Akuma. Allen then goes off to Southern Italy, and evenly gave Allen his uniform. Komui also knows more about Allen's golem Timcanpy. Meanwhile at Southern Italy, some finders succeeded to seal some of the Akuma's with their talismans and one of them noticed that the Akuma in the middle killed a lot of peoples. Suddenly the Akuma shoots one of the founders. That hit was his evolution to a new level and starts to attack them. The finders from where the Akuma's where sealed, give information from there about what happens to them. The leader tells them that the Exorcists will come soon and from the time being, that they must going to protect the Innocence.

The Eerie Legend
When Allen, Kanda and Toma are heading to train because they are later Allen is wondering about a question. Inside of the train, Allen learn that, because he is a member of the Black Order, he can get in any place which he desires. In one of the train cabin's he ask Kanda the same question that he tried to tell him when they are heading for the train. Kanda explain it to Allen, which Allen understands it and wonders who the Ghost of Mater is. Toma then heard the conversation and tell them what or who the ghost of mater is. Meanwhile the akuma Pierrot is still looking for the ghost of mater. Two strangers that are protected by the finders named Lulu and Guzol are talking to each other. Guzol tells Lala to escape which she won't because she want to stay with Guzol. Pierrot then found them, which Allen, Kanda and Toma are heading to the ancient city knowing that the ghost of mater is a doll.

Trivia

 * The last scene between Lala and Guzol is the favourite scene of the manga of the author Hoshino Katsura.