Quote Originally Posted by DEX
Other than, you know, like a dozen people back home? Why wouldn't he give it to Levi or Jean instead of some kid he just met?

And WHY would you intentionally pick a kid? Marley does it because they're child soldier brainwashing assholes. There's no reason for Eren to do that. They were going to make the commander the colossal titan until Armin needed it instead. Why doom some kid to die in his 20s when you don't have to?
1) kids taking the power seems to be the theme here.
2) Levi is Asian, he can't be big.
3) The kid is prepared to become a titan, and not for self or Marley Glory. That's the key thing here. You don't see me suggesting Gabi as the next Attack Titan candidate. Affinity and physical performance seems to have something to do with it as well.

As for the colossal, they never intended on anyone in particular to inherit it. The syringe was reserved to be used on whoever was in a critical condition. It doesn't HAVE to be a kid, but that's the way things are happening here. The only exception seems to be Daddy Jaeger.