Chao was planned, she probably planned herself to be part of 2a in order to be with her ancestor/involve him in her plan/etc, remember she is from the future and linked to Negi, her involvement in turn leds to Chachamaru's creation (remember the robots were created with input from chao) that's why I say that chachamaru was random, eva is random but it doesnt matter much since for Negis blood she would've pursued him regardless of her grade
Originally Posted by xxsaznpride
And please forgive for going even farther off topic, but Chao is really a quiz no matter how you look at it, being from the future and being descended of Negi implies that she somehow messed with Negi's fate, something wich she did regardless of not having magic exposed
Now to really throw an off topic, have anyone considered that 1) Chao probably succedded? 2) That Chao's magic (dangerous magic) is a side effect of Negi learning black magic? could it be that Negi's black magic marks all his descendants? 3) Will she (Chao) ever come back?