Sousuke Sagara: Tomokazu Seki
Kaname Chidori: Satsuki Yukino
Teletha Testarossa: Yukana
Kurz Weber: Shinichiro Miki
Melissa Mao: Michiko Neya
Kyouko Tokiwa: Ikue Kimura
Mizuki Inaba: Sayuri Yoshida
Andrei Kalinin: Akio Ohchuka
Richard Madukus: Tomomichi Nishimura
...they are same with the 1st season. And now I guess it's official that Tessa, Kurz and Mao all appear in the new series considering the cast. And followings are new characters' voice actors:
Atsunobu Hayashimizu: Toshiyuki Morikawa(Naraku in Inuyasha, Alex Law in LAST EXILE etc)
Ren Mikihara: Rie Tanaka(Chii in Chobits, Lacus Clyne in Gundam SEED etc)
Bonta Kun(that teddy bear): Tomoko Kaneda(Chiyo in Azumanga Daioh, Marie in Please Teacher etc)
Issei Tsubaki: Jun Fukuyama(Maruo in Narue's world, Touga in Gravion etc)
Last but not least, Tessa in Jindai high school uniform from the 2nd season anime:
