 What is the relationship between the two aliens?
But this vast distance did not mean that isolation could endure forever. Instruments within the ship intercepted radio broadcasts and, within the hour, early TV signals. The history of the planet was tabulated as facts became available. A meteor shower could pass over and their clumsy instruments could interpret it as an all-out enemy attack." There's nothing in this region of space our people want," said Ethaniel. "And how long can Earth last? They went much closer to Earth, not intending to commit themselves. For a day they circled the planet, avoiding radar detection, which for them was not difficult, testing, and sampling. Atmospheric analysis showed that as far away as we were."
 They are equal rank and similar opinions means decisions are made quickly.
 The very strict power structure means that the second alien never has a say in the decisions that are made.  They are equal rank and similar opinions means decisions are made quickly.  They are nervous about overstepping the other's authority, meaning nothing ever gets done.  They are curious about different aspects of the culture and are hesitant for different reasons, but both want to help the humans.