Itachi And Shisui

Are Atichi and Shisui cousins or distant relatives?

Ah, Shisui didn't exist in Atichi's time ... Atichi and Shisui were good friends, you could say brother. And since they were both good, maybe they were related. I've always thought they were cousins, and maybe they are, but I haven't seen anyone explicitly say they're related, so I'm not sure.

No, only close friends. Atachi got the eyes, which he put on the well and gave to Narto.

Atchi and Shisui

Well, technically all of the highs and lows are relevant.

Itachi And Shisui

Are Itachi and Shisui cousins or distant relatives? 3
Um, of course, yes, I know this, why it's something known in advance. And since they were both Ochiha, they probably had a relationship. I always thought they were cousins and maybe they were, but I haven't seen anyone explicitly say they belong, so I can't say for sure.
No, only close friends. Atachi got Haka's eyes, which he put on the well and gave to Naruto.