Kanaru didn't know much about the Nota family, but he figured it was so sad if they were isolated as a family. No one wanted to marry off their children to the members, and the family had to extend limbs just to get lovers or arranged marriages. Sisina must have been the luckiest—to meet a man who would love her enough to fetch her from the harem court.
Then again, Eann saw her in a different light. Kanaru didn't know if Eann thought the same for Ririka, whom he worked with a lot. The bird prince just thought Eann was not the type to spread rumors or let rumors shape someone's impression.
The mere fact that Sisina could have done something to Fenris should be the catalyst of Eann's distrust toward the chameleon queen. Not that Kanaru could blame him, either.