Regarding Anniversary rewards..

[Sinforthewin]

Hi, I would like to ask if the character that holds 10 boxes in inventory OR the character that purchased 10 boxes will be credited with the anniversary tier rewards? I purchased it on my character (A) but I have decided to main the other character(B) and would like B to receive the anniversary rewards.

[Skyros]

The one who BOUGHT the box will be credited. Its the purchasing that counts, not the status of the box.
Since the event is a character-basis event, you can make Character B eligible aswell by buying boxes again.

[Sinforthewin]

Aww.. alright thank you for the clarification

[RavenSnow]

The only character who will receive the rewards will be the one who purchased it on Cash Shop. So in your case, only Character A will receive the rewards.