Ari hasn't had too much contact with Oda even though she's been in the family for six years. She wonders why she hasn't seemed to age at all during those six years and because of that is a bit weary of her. Ari gives Oda the utmost respect but she is a bit too curious about her non-aging. This is to the point where she is willing to spy on everything Oda does by using her resources as Head of Intelligence. She hesitates to be mean/rude to Oda because of her 7+ years of seniority. In short, she'd be the only one to tell Ari (save Nova/Felicita/Libertia/Luca) to "shut up" and she'd actually consider doing such a thing.
Oh my god, ahaha! I love it but Ari will outwardly hate it.