It's one of those moments when I'm sure Haru hates being right.
Also, regarding the lion "fitting" into Ako... I wouldn't say that's the big issue (pun not intended). It'd be the barbs hurting her insides and making her bleed.
Also, even though Louis and Juno kissed, he already mentioned that he has a fiancée for an arranged marriage. Considering how he's intimidated by his father, I don't think he'd try to go against him for now.