As a Krishnan and a hybrid between the advanced tailless and the primitive tailed races, Yuruzh might have gone either way, but in the event gained super-intelligence. Feigning that the treatment wore off, he was permitted to return to Krishna, where he has been uplifting his tailed compatriots by giving them the same treatment. He asks Althea to be his wife, and partner in his civilizing mission.
Krishnan, a being of mixed ancestry, with traits from both advanced and primitive races, might have developed either way. However, he gained superintelligence after undergoing a treatment. He then pretended the treatment was over, returning to Krishna where he has been helping his fellow tail-bearers by giving them the same treatment. He proposes marriage to Althea, wanting her as his partner in his mission to uplift his people.