[Akira has been through more than enough already. Minato doesn't want him to have to keep fighting.]

Won't let them take you. [He has no idea who 'they' might be. But...he makes a silent promise, here and now, that if it comes to it - he'll go in Akira's place. Or Goro's, or Kurama's. The three of them went through one nightmarish 'game' already. Minato hasn't.

He'll protect all of them.]