In this blog, the purple stick figure I will be refering to is the one in the AvA Card Game.
A lot of people may take the Purple? stick figure as the same one in AVM Shorts Episode 9, however if you were to look closely, the head proportions are very different, with Purple? having a bigger head. This actually proves that Purple? IS, or was a stick figure with an 'O' head, as those stick figures have a bigger than average head. However, how is Purple?'s head solid? Well, he coloured it solid. This is proven possible in AvA IV, where TheSecondComing draws a pair of wings and it could be connected to his body, showing that stick figures can add not only colours, but also more parts to itself.
But who was Purple?? We could quickly know it isn't TheChosenOne, as he is now in TheSecondComing. This makes victim the obvious one. However, some can say that victim is non-canon, since the video appears in Animator vs Youtube. Of course, some may say that it could still be canon and the video is just a recreation, or TheDarkLord could also be Purple? since he could have coloured himself black once. But I do not think that it is true, as although TheChosenOne was able to return, he could only return in the form of TheSecondComing, proving that the previous stick figures no longer have a physical body and could only pocess other stick figures. After AVM Shorts Episode 9, where it is shown that there could be other stick figures out of Alan's computer, I think that Purple? was actually just a fanmade stick figure. As shown in Animation vs Youtube, the Animator vs Animation video is shared on Youtube, making it possible that there is a fanbase for AvA in the AvA universe, hence it is possible that someone else also created his own stick figure that came to life. This also explains an intention for his disguise. He wants to be with Alan's stick figures due to him being lonely!
Well, that's all I have, go and create your own theories. Thanks for reading!