I simply love Trinity Blood and from that the RCO (Hello there Isi and Diddy!). My personal opinion is though, that the anime is really crappy done. I would say about 0815 cheap style. Also the storyline a little confusing. Taking here and there bits and pieces and putting together. However I can highly recommend the manga, done by Kiyo Kyujo. It is awesome. Furthermore the novels are a must read.