

For those who have played the original game, there is a reason for 2B keeping him at arm's length - but without that knowledge for anime-only viewers, it looks more like a hard-to-get attitude. If it wasn't obvious already, 9S has a massive crush on his partner and even the audience can pick that up. To sum up their dynamic, it's basically the happy one and the serious one - it's a balanced relationship to say the least. Episode 3 provides a great example, when 9S loses his balance during their mission and 2B catches him. Unfortunately, this recklessness can land him in a lot of trouble, but 2B is there to help him back on his feet. Let's not forget though, 9S is just as useful as 2B is and contributes greatly to their teamwork - to the point of going above and beyond to ensure their mission is successful. 9S definitely tries his best, but he can't help but be so happy to have a new partner. 2B on the other hand, is very focused on her job, and frequently reminds 9S that emotions are prohibited in accordance with YoRHa standards. He wasn't flirting, he's just a nice happy-go-lucky person. In another scene, this time in the game, he compliments her again, only to get shot down and accused of sucking up. He replies, 「はいはい」("yes yes") in a peppy tone which 21O scolds him for being too casual. In episode 1, 21O contacts him with further instructions. Let's look at 9S's character first, he's upbeat and positive - and this is just about life in general.
