The characters are three dimensional and very well fleshed out. I especially like Yomiko's character, although that could be partially because she's one of the few characters who has a larger personal library than I do. I'm joking, she's just a really well developed character. She kicks ass and has awesome moments, but she's also very human and vulnerable, which makes her a very relatable character. Nancy and Drake are also very well written characters. My one problem with this aspect of the series is that the antagonist is a little two dimensional, but even he has several interesting aspects to his character.
The art is very nice. The fight scenes are very creative and flow very well. The character designs fit the characters perfectly. The backgrounds are nice and detailed. I wouldn't expect anything less from the studio responsible for Maria Sama ga Miteru and Samurai Deeper Kyo.
The voice work is very well done and the sound fits the epicness set by the rest of the aspects in the OVA. Neya Michiko and Miura Rieko both do exceptionally well. I kind of wonder why Miura desn't have more voice acting credits aside from just Yomiko, but I'm sure she has her reasons.
The relationship dynamic between Nancy and Yomiko is extremely homoerotic. They never do anything explicit, but I'm giving them a yuri factor of 7/10 for subtext so blatant it's almost canon.
My final rating for R.O.D. the OVA is a 10/10. It's as close to perfection as it could possibly be. If you're a fan of Witch Hunter Robin or Le Chevalier Deon you'll probably enjoy this thoroughly. The action is solid, the story is well constructed and it has a pretty high cute factor too.
