Edit, that became long enough to post as a reply

Making the different instances of Celestia more distinct and obviously manipulative might address the worries some people were having with the statements about relationships it was making. They will seem less unsettling if it is obvious it is saying them because the college age male character is likely to believe them.

Having radically different personalities for dealign with different individuals would make sense, most obviously [the business/beer guy] gets obviously frustrated with Celestia's tone/vagueness, perhaps he would respond better to a more informal friendly God/AI.

[Aside, I found it really hard not to say 'she' when referring to Celestia here. ]