<You have seen the Hork-Bajir. They are the Yeerks' shock troops. The Taxxons are the long creatures with the numerous legs; they are almost exclusively voluntary Controllers, motivated by promises of food. Always hungry, often cannibals. Excellent reflexes.>
<That is the only Andalite who has ever been taken alive by the Yeerks. The only Andalite-Controller. Visser Three.>
<Prince Elfangor-Sirinial-Shamtul, if I am not mistaken. An honour to meet you,> he says mockingly. His silent voice is very distinct from the Andalite's. There is no doubt as to who is speaking.
He doesn't answer Visser Three.
The question doesn't sound so much like he's curious as that he has chosen a question-shaped way to voice sorrow.
<Humans are many,> says Visser Three, stalking closer to Elfangor. <Many and weak. Billions of bodies, waiting in helpless ignorance for the Yeerks who will control them. We'll have to build a thousand new Yeerk pools just to infest them all. With this many hosts, we can spread throughout the universe. Unstoppable! Glorious!>
<I promise you this, Elfangor,> the Visser continues silkily. <When we have this planet, when we move against your homeworld with our fresh army of human-Controllers, I will personally hunt down your family. I will personally oversee the placement of my most faithful lieutenants in their heads. And I will require detailed reports on how their minds scream when they try and fail to resist.>
Elfangor's tail flashes forward. The motion is almost too swift to see, but it's illuminated with a sudden light-flash from the tail of his ship, which fires at one of the small Yeerk fighters and obliterates it.
<Fire!> he screams, presumably to his subordinates. <Burn his ship!>
Tight red beams from the big ship and the remaining fighter spear the Andalite's damaged craft, with that same familiar TSEEEWWWWW. It glows, then disintegrates slowly, leaving behind a yellow-white ghost for a few seconds. A wave of heat rolls over the surrounding area, not quite blistering by the time it reaches the hidden observers.
<Hold him for me,> Visser Three orders. Three of the Hork-Bajir scramble to obey, grabbing Elfangor's arms and tail and forcing him to the ground, one holding a wrist blade to his throat.
<You must not interfere. He must not see you,> he tells the kids.
His head grows larger. His legs slide toward each other along his body, meet, and merge into two thick trunks. His delicate arms sprout into vast curling tentacles. His mouthless face splits into a huge fanged grin. He grows taller and taller, twelve feet, then twenty.
He emits a roar that shakes the ground and rattles the skeletal buildings around them.
One of his long thick tentacles wraps around Elfangor's neck and hoists him casually out of the grip of the three Hork-Bajir.
Elfangor cannot restrain a generally-broadcast cry of pain, or fear, or despair - but his tail never stills once it's freed; he slashes at the monster that Visser Three has turned into.
This goes on for a while. The Hork-Bajir make rhythmic huffing sounds that might be a form of applause; from the axe-blade ship there drifts a very human sound of laughter.
He gives one last swallow. A ropy, glistening tongue dislodges a finger from between his teeth; a Taxxon lunges for it as it falls and gulps it out of midair. Then Visser Three demorphs. His stalk eyes sweep the area, still lit by one red spotlight, but he seems to detect nothing out of the ordinary.
<Back to the ship,> he orders. His subordinates follow him as he boards, Taxxons first, then Hork-Bajir. One Hork-Bajir lingers in the doorway; then it closes, and the ship lifts off and soars away, trailing its one remaining fighter.
All that remains are a few splatters of dark blood, its colour indeterminate in the dim light, and a small patch of gravel warped by the heat of the Andalite's ship disintegrating directly on top of it. Only the point where the front end contacted the ground is marred in this way.
The other tucks the blue box into the same bag as her notebook, first.