Natsuki is jealous of her ability to perceive and share emotions, such a skill would help a reserved person like her a lot. Iman was jealous because she also wanted to be with him from the beginning, she also wanted to have a 'soul mate' connection with him. I think xD
This is the best answer up to this moment. And the most complete one.
Congratulations, the answers for each leave a clear difference between envy and jealousy and state clearly the facts.
You've earned yourself the chance to pick the next Harem member. And probably last. For a while, at least
Ad'S ability to share emotions its good and all but dont go and make him so overly emotional or he will just turn out to be another bell the only diff. is that he knows how to fight and xoxo