We walk mostly in silence. At one point, to break up the boredom of the hike, I tickle Six’s face by lowering a branch right in front her. She swats it away without breaking stride, too completely focused on what may lay ahead. As we walk I think about Six. About how fearless she was back with the soldiers. She’s always so calm, cool and collected. She takes command and makes decisions as if it were the most natural thing for her to do. One day I’ll be like her. I’m sure of it.

I wonder what Adelina would think of Six – and about me now. I wonder how much further along I’d be if she had trained me. I know all those years in the orphanage without guidance from her means I’m not where I should be. I’m not as strong and confident as Six. I’m not even as knowledgeable as Ella. I try to bury my resentment and focus on Adelina’s final act of honor. She charged at the Mog fearlessly, armed with just a kitchen knife. I try to stop the memory before I get to the part where she dies. I almost never do. If only I’d had the courage to fight alongside her, or knew then how to use my telekinesis to unwrap the Mogadorian’s hand from Adelina’s neck. If I had, she might be walking with us right now.

‘We rest here,’ the commander says, his voice breaking through my reverie. He points to a couple of flat boulders bathed in the afternoon sun. Just beyond the rocks I can see a small stream of fresh water. ‘Not long, however. We need to make a lot more progress up this mountain before nightfall.’ He looks up at the midafternoon sky.

‘Why? What happens at nightfall?’ Six asks.

‘Very strange things. Things you are not yet ready to see.’ Commander Sharma takes off his shoes and socks, rolls up the cuffs of his pants in a fussy sort of way and wades into the stream.

Crayton removes his shoes and socks too, and follows him. ‘You know, Commander, we’re already taking a pretty big leap of faith just following you up this mountain. The least you could do is answer our questions when we have them. We have a very important mission. And we deserve your respect.’

‘I do respect you, sir,’ he says. ‘But I follow Vishnu’s orders.’

Crayton shakes his head in frustration and walks further upstream. I notice Ella has wandered away and is sitting alone on one of the boulders by the stream. She’s been wearing the dark glasses from my Chest the entire hike, and she takes this moment to clean them carefully on her shirt. Seeing my gaze on her, she holds them out to me. ‘I’m sorry, Marina. I don’t know why I hung on to them. It’s just that –’