So, in trying to think about how Haruka and Artemis would interact, I can’t get over seeing Haruka as someone who steadfastly dislikes and distrusts cats (which is kind of funny to me, because I easily see the rest of the Outers family as cat people). 

Eventually, Mina has to sit Haruka down like, “Now, I love all my girls, but when it comes down to it, you and Artemis are the two I need most for certain things. So you should probably get used to each other, in case I need you to like, bail me out of jail or something.”

And Haruka’s just, “Mina, he’s a cat.”

“Yeah, he’s got the brains and the secret moon money fund, you’ve got that human body thing going that the police generally like, you’re a perfect team.”

So Mina makes them meet up, probably in her house while she’s “out and about” but actually crouching below the window to listen to how it’s going. And it goes awkwardly. Haruka just keeps asking questions like “So do you like tuna? What is catnip really like?” And Artemis tries to steer the conversation towards Mina, because she’s their common ground other than senshi business, and because he has generally good recollection of the Silver Millenium, he’s wary of talking senshi business with Uranus. But Haruka just cannot get over that he’s a cat. Her best friend’s other best friend is a cat. 

And basically they end up deciding that if Mina needs them, they’ll work together, but otherwise, it’s best to pretend the other doesn’t exist.