The kids were named in order of power right? Is the order not the wrong way around?
7 is the most powerful, 5 is really powerful too and 6 is Number 1 in the Sparrow Academy?
Meanwhile 1 is losing fist fights with regular people even though strength is his power? 2 can just throw knives good?
yes, thats sort of the joke.
Power levels are inverse of their numbers. Although, there is obviously some leeway, in the sense, time travel is obviously the strongest. or Rumors reality warping is obviously much more powerful in usefulness for the most part, so, some of it is intensity.
But Number 1 is outwardly the strongest. The classic brick. Big and huge... but hes also the weakest.
number 2. the kraken.. looks smaller and weaker then Spaceboy, has to use knives etc.. But always beats him in a fight.
Number 3. The Rumor. can rewrite reality in a limited fashion by saying it. again, technically an insanely powerful power.. but, presumably this is an intensity issue. she can rewrite reality in a limited basis locally. Can't just "I heard a rumor the moon stopped crashing into the Earth" but could, "I heard a rumor your foot was made of cheese"
number 4. The seance. Army of ghosts is obviously potentially strong. either outright fighting, or info gathering, possessing others, etc.
number 5. the boy. his time travel power should be obvious..
number 6. the horror. ben. not clear why he would be considered so strong. Potentially since hes a prison for the inter-dimensional beast.
number 7. the white violin. TK directly powerful enough to destroy the world.
notice the characters also outwardly seem "weaker". giant dude, fit dude, fit woman, drug addict, child, dead, *seemingly normal no powers* woman.