The story is good, setting up interesting situations, and even conflicts of interests for our protagonist, Fighter D...
He's supposed to be destroying the Dragon Keepers, but Green Keeper/Chidori seems like a really cool guy, even having a nice family despite his gothy emo looks, and showing mercy to D despite knowing that he's a kaijin infiltrator.
Half the Ranger organization seems to know or suspect that he's a kaijin.
Even if D does destroy the Keepers, there are lower ranked rangers waiting in queue to pick up the mantle.
And the kaijin bosses don't seem to be very sympathetic, so what's D fighting for?
The Snake Boss arc was fun.
Going back to episode 2, apparently the Boss monsters are themed after the Eto Animals, which are pretty much the same thing as the Chinese Zodiac animals: https://www.nippon.com/en/features/jg00110/
Of which the Dragon Keepers had defeated 7 of them as of episode 2:
Team Green just defeated Magatia/Snake 巳
The 4 remaining bosses are:
- Peltrola/Rooster 酉
- Hwalipon/Horse 午
- ?/Monkey 申
- ?/Rabbit 卯