Thanks to Asternove for completing the challenge to unlock the second panel, and thanks to HandsomeSquirrel for completing the challenge to unlock the third!
This one necessarily requires knowledge of Weapon Balls, but it is the final challenge.
Three of the people in the third panel are known by multiple names, so giving any correct set of names (the one name that applies to each, the individual names that each technically has, or the collective name for the three of them) for those three will work for saying who they are.






