Does any one know if Grell is going to reapear in the Manga again like in the anime?

He has already reapeared in chapter 55.

He was mentioned to have a new assignment dealing with the Phantomhives so it's possible. Also he's one of Yana's favorite, she's definably bringing him back.

I agree with vamp_grl_123.
Ronald mentioned an assignment Grell had dealing with the Phantomhive household, so... there's just not much Mehr to it than that lol. It's not unlikely.

I agree with emiliux123. He's there with Ronald Knoxx collecting souls from people eaten Von zombies! Yay!!! Anyway Du will be looking vorwärts-, nach vorn to the point when Grell sees Sebastian is there! Like Grell says, the purest form of Liebe is a death match! XD

dont know but i realy hope he will!!!!

Pretty sure....