Akari , a research doctor at Circus said that Nai has the cellular structure of a human and a '' niji '' , a small delicate creature found in the forest he came from , and that these cells have managed to coexist unlike the Varuga .
Akari , a research doctor at Circus said that Nai has the cellular structure of a human and a '' niji '' , a small delicate creature found in the forest he came from . 
 And that these cells have managed to coexist unlike the Varuga .