Actually....

you need to place him in a square that is adjacent to an opposing character. However:

1) the friendly character doesn't have to be adjacent to an opposing character. (Gamora would like to slash char A who is behind two Hand ninjas, within Gamora's Charge. Ninjas are a square away from Gamora in hindering, blocking Gamora's possibility to Charge at
Char A. Enter Pip who appears between the ninja and Gamora, smashes one ninja away with a Heavy Object and clears the path for Gamora to Charge)
2) you don't need to place Pip adjacent to the same opposing character the friendly character is adjacent to. (Drax is pummeling char A, and Pip appears and smashes char B that is one square away from Drax)

Since it clearly states movement and it seemed unrestricted to his speed value. A path could not be defined. So the ruling we used at my venue was Pip could pick up an object from only squares adjacent to the starting and ending positions.

EndrMindbendr