It was true that a contract creature needed to listen to everything its master said, however, there had also been mages who had been killed by their contract creatures. They either had no intelligence or were too intelligent, and having rich emotions could cause huge trouble. A mage would usually only take in one contract creature as it required a lot of focus to nurture them.
Saleen had never created any sealing type of equipment to conceal Nailisi so as to live together with her. Nailisi was highly intelligent and if he treated her like any other contract creature it would lead her to be distant towards him.
It was a pity that Saleen did not have time to interact with the winged skeleton now. He had a guilty conscience and wanted to leave the lightning dragon's nest as soon as possible.