Ena is shaping up to be my favorite cupid too. Theyre truly devoted to the cupid cause and doesnt seem too motivated by the added bonus of returning back to life. Matter of fact theyre pretty detached from human life as a whole shown by their anger/coldness when Koharu brings up the cupids...
Honestly this new cupid is really interesting... the first reveal in Ena's birthday art to appearing in the chapter beginning its seriously insane. Even in the scene where touma is being charmed the carefree way they talk the easy manipulation even just seeing their legs from underneath that...