She's chastised by the two present Green Lanterns, Hal and Kilowog:
Hal Jordan: It was dangerous to up and leave your post. We need to set a few parameters, young lady.
Aya: A Green Lantern protects innocent life, even at the risk of their own, correct?
Kilowog: Wait. Wait a minute. Aya, you do understand you're a navcom, not a Green Lantern, right? You can't be a GL.
Aya: Why not?
Kilowog: Well, first off, the ring's got to pick you.
Kilowog: Look. Green Lanterns’ positively got to have a physical body to walk around and interact with people, not a bunch of creepy bugs.
Aya: Parameters set.
The “creepy bugs” proceed to reconfigure into a humanoid body. The green energy that powers the rings flows into that body, and she speaks. “A body like this?” There are at least two interesting things happening here. First, she gets a body. Second, she accepts why a body is neede.
She gets a body. It’s assembled from the “bugs” that she teleoperated. They’re part of the ship, part of the “world” she lives in. Her body is formed from those parts, and then the power (literally, the energy powering the ship) flows into her body. It fills her from the bottom up, like water filling a glass. Aya is formed from the cyber-dust of her world and then filled with the power that gives her life. Though art parts of the ship, and to parts of the ship you shall return.
She also accepts why that body is needed. Kilowog stumbles for an explanation, saying that a body is needed to interact with people. That’s true, but that’s only a partial answer to why she accepts the need for a body. She doesn’t want to just “walk around and interact”—that is not her end, only the newly discovered means. The end is something she was taught earlier, and she brings it up as her defense—the apologia for why she risked herself. “A Green Lantern protects innocent life, even at the risk of their own”. She needs a body, so she can offer it for others. She needs a body so that body can be put in harm’s way for the sake of others.
Jesus took on a body, as well. He, too, formed his own body from the “parts” laying around—knit together in His blessed mother’s womb. (Ps139:13) He filled it with His human and divine soul.
Why? Why did He need a body? He tells us: “Amen, amen, I say to you, unless a grain of wheat falls to the ground and dies, it remains just a grain of wheat; but if it dies, it produces much fruit.... it was for this purpose that I came to this hour.” (John12:24,27b; cf Mt 16:21, Lk 9:22)
He walked around and interacted, yes, but that was not the reason—not the end—of the Incarnation. The purpose was to suffer and die, to put His body in harm’s way for the sake of others—and not for innocents but for sinners.
He needed a body to be nailed to the cross.
To save us from the abyss of sin and death.
To suffer and die for you.
Image from http://en.wikipedia.org/wiki/File:SVouet.jpg