Well can't Funimation is a big late getting to these series but meh, it's better late then never.
Shu Ouma - Austin Tindle
Gai Tsutsugami - Micah Solusod
Makoto Waltz Segai - John Swasey
Inori Yuzuriha - Alexis Tipton
Ayase Shinomiya - Emily Neves
Tsugumi - Monica Rial
Yahiro Samukawa - David Trosko
Souta Tamadate - Corey Cleary-Stoner
Shuichiro Keido - Charlie Campbell
Haruka Ouma - Martha Harms
Hare Menjou - Tia Ballard
Argo Tsukishima - Jarrod Greene
Daryl Yan - Joel McDonald
Arisa Kuhouin - Caitlin Glass
Yu - Leah Clark
Shibungi - J. Michael Tatum
Mana Ouma - Alexis Tipton
Kanon Kusama - Apphia Yu
Can't say I'm happy about austin doing shu's voice he doesn't fit the character at all. But the trailer gave a good mix of the opening and the scenes of the show.
Crunchyroll - VIDEO: "Highschool DxD" English Dub Preview and Latest Second Season Visual
Just read all that to lazy to C+P
Not happy with the main characters voice either.