I'm beginning to get them straight -- after watching the show three times: raw, Chinese sub, English sub. I'm enjoying Hijikata (duh) and Sannan (l-r):
Sannan is played by Tomita Nobuo, who was Lumiale in three different
Angelique shows, and Sei in
Uta~Kata, and has a career going back to 1981. I just love that voice. Hijikata is played by Miki Shinichirou: