Volume 17

True Identity (正体, Shoutai) is the seventeenth volume of the D.Gray-Man manga series.

Summary
It is discovered that a ghost of a girl experimented on by the Order had Krory spread the disease. The ghost, not willing to be forgotten and unable to leave the building, prevents the headquarter's move. Komui tells her he will not forget anyone who has died for the Order. The antidote to the disease is administered, and the move is completed. At the new building, Allen has an audience with Cross where he learns Cross was asked to watch over Mana, the brother of a Noah traitor called the 14th, until the 14th returns. Allen is the host necessary for the 14th's revival. The 14th's memories inside Allen will erode him away until Allen kills someone he loves and becomes the 14th; because of this, he is a threat to the Order. A secret agent fatally shoots Cross, who subsequently disappears. Bookman believes that if Cross is still alive, he will not return, and Bookman and Lavi are in the same danger. Meanwhile, Malcolm receives a message confirming a fragment of the Akuma egg has reached the North American Branch.

161. The Black Order's Destructive Affair - Again
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162. The Black Order's Destructive Affair - Returns
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163. The Black Order's Destructive Affair - Serious
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164. The Black Order is Truly Destroyed
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165. Rain
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166. True Colors
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167. Hints
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168. Parting Ways
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169. There Was a Silence
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170. 10 Days Later...
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171. The Other Side
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