I've got two series, and the "flagship" series isn't the one that just updated (or what my rewards are around). So, I'm going to bend the rules a bit and provide links to both...
The most recently updated:
And the flagship series (the print and e-book for which released yesterday):
For the rewards, Re:Apotheosis characters will react to various things:
30,000 - Monster hunter Jenny Calhoun reacts to the horror genre.
60,000 - Mech pilot Atria Silversword reacts to Pacific Rim.
90,000 - Isekai hero Daiki Yamato reacts to Conan the Barbarian.
120,000 - Atria Silversword and Princess Stellaria react to the One Ring.
150,000 - Reader's choice.