[Wing offers a patient smile.] They are not people so much as cosmic entities, the deities of my people. Primus is our god and creator. He is the bringer of light and life. He is usually manifest to us in some way, often as the core of our world. However this Cybteron is young and the First Forged still prepare for his arrival. Part of that preparation is purging the world of Unicron's corruption.

As to why they fight, it's an age old struggle is it not? Territory, power, control. The difference being that one is benevolent and the other is not. The Lambda is Unicron's way of seeding chaos onto the world. It's plucking matter: objects, people, whole buildings, randomly out of time/space and depositing them here. Sometimes it's monsters, either his own forces or natural species corrupted and lost to his chaos. Either way, they are focused solely on the mindless eradication of anything not of their kith.

[He looks almost sad for a moment.]

I'm sorry to paint such a dismal picture. You...do not seem like the type who'd want things sugar-coated? [ But then he brightens, because as long as Wing's spark pulses he will foster hope. ] There are good things in this world too though, happy and beautiful and inspiring.