More on Arya and Jaqen

[Judderman]

You may be right and it is another blade.

 

[Dulahan]

Wait, in the wall? No, I think she took Needle from the wall or whatever and brought it to her hide-out by the water. She used it to kill Waif which was way after Myrin Trant.

 

[The Imp]

I thought Needle was still hidden in the wall when she took out Trant?

Needle had not been retrieved yet. If I'm not mistaken, she stabbed Trant in the eyes with a small dagger/knife.

 

[Mister_Oy]

^^^^ Yep that's what I remember.