If you're looking for anime similar to Early Reins, you might like these titles. All recommendations are made by Anime-Planet users like you!
In the ancient past, a great civilization known as the Ords flourished on the Earth, worshipping light and the sun. In the present, Professor Rayna Kizuki is studying the Ords and possesses a mirror rumored to have the power to unlock the powers of the ancient people. Keeping track of the mirror, however, is a difficult task with twins Mai and Mami Tachibana and power hungry Rieg on her tail, who want the mirror for themselves! The mysterious secrets of the ancient ruins is about to be uncovered, but is the world ready for this ultimate power?
These two series have nothing in common plot-wise, but I still think they make for a good recommendation pair due to the combinations of good girls kicking ass against questionable bad guys. It might be a stretch, but I still think it fits.
Kawakami City is famous for its strong dedication to its samurai ancestors. A healthy fighting spirit is always valued and it's even an important factor for success at school. Yamato, a second year student from Kawakami High school, is always with his close friends (4 boys and 3 girls). They have all known each other since they were young and have done many things together. While they have many other friends, this group of seven is a close-knit, inseparable group. They even have a secret base where they meet. With the new semester, they welcome two girls into their group and shortly after things begin to change...
Liked Early Reins and looking for another show with kick-butt women? Try Maji de Watashi ni Koi Shinasai! The settings are opposite sides of the world, but they both center around a strong female cast (although it is unfortuately full of ecchi).