I do too! I wanna see Rin and Kureno! (rin=horse kureno=rooster) I *think* the reason why they were'nt added was because the anime started while the manga was still in print. As for when they are going to translate, I have not a clue...I hope soon. BTW here are pics and bio's of Rin and Kureno.
Isuzu (known as "Rin") was Haru's girl until she mysteriously dumped him after leaving the hospital. Rin tends to be seen wearing very *ahem* revealing and sexy tight clothing. She also has extremely long, black/brown hair that she lets fall loosely.
She has some sort of connection to Hiro, since they're seen together... and another sort of connection to Shigure. Similar to how Kisa was, Akito somehow beat Rin up and put her into the hospital... =.=;
She seems to have dumped poor Haru because of the fact that she wants to protect him from Akito's wrath. So she secretly still watches him from afar... only because she still loves him. *awwww* ^^;
Kureno is hidden away from everybody else and serves loyally by Akito's side. He appears to be around the same age as Shigure, Hatori and Ayame, but doesn't seem to associate himself with them.
By the looks of it, Kureno seems to have short light brown hair and wears normal/casual clothes.
One of the few times that Akito let him out, he bumps into Uo-chan at the grocery store she works at picking up some snacks! ^^; (vol.9 - ch. 50) When he bumped into her (he couldn't see over the pile of snacks he collected), he spilled all of the bags, and she starts to laugh at him! She said it reminded her of one of her friends (Tohru ^^; ) And Kureno notices and is just amazed how she can laugh so freely, and is attracted to her laugh and smile. ^^;
On another day, Uo-chan was on a lunch break from work and notices him walking around. He ends up treating her to lunch, and she gets mad at him for something he said carelessly. She storms off angry as hell... but Kureno catches up to her and apologizes. They talk for a bit, but then Kureno suddenly gets closer to her and looks into her eyes... as if he's about to kiss her... then thinks to himself "So this is what love is?" ...and goes away... leaving poor Uo-chan a bit shocked. ^^; (kawaii! XD)