Kuku, an orphan, is the childhood friend of Arua. She was the first person to be willing to talk to Ryner and Ferris when all the villagers were running away from them. After Arua was saved by Ryner, Sui and Kuu abducted Kuku and lie in wait for Arua in an attempt to crystallize his eyes, without knowing that Ryner and Ferris were the rescuers. She was almost killed as a hostage by Sui if not for the intervention of Froaude. Thereafter, together with Arua, she defected to Roland and lived in the Eris mansion.

(Source: Wikipedia)