Asaka Kasei

Asaka Kasei (朝加かせい) is one of the six main characters in Star☆Twinkle Pretty Cure. Kasei's alter ego is Cure Mars (キュアマーズ), the Pretty Cure of Planets. Her catchphrase is "This is a rocky______!" (「これは岩だらけの______です！」 "Kore wa iwa-darake no______!").

Etymology
Asaka (朝加) - Asa (朝) means "morning", while Ka (加) means "add, increase, rise". Making "Asaka" mean "morning rise". Asaka also includes the word "aka" which is Japanese for "red", relating to Kasei's theme.

Kasai (かせい) - Is the Japanese word for "Mars" matching up with her theme overall. It is a later revealed that her mother didn't just name after Mars cause she was born on red planet day, but also because she wanted her daughter to be someone who will always be there and support people, like how Mars is always there next to Earth supporting it.

Together "Asaka Kasai" can mean "morning rise Mars".

Cure Mars is a noun that can mean "energy, passion, drive, desire, and determination".

Cure Mars
"The rock-solid planet who's always beside you! Cure Mars!" いつもそばにいる堅固な惑星！ キュアマーズ！ ''Itsumo Soba ni Iru Kengona Wakusei! Kyua Māzu!''

Cure Mars (キュアマーズ Kyua Māzu) is the Pretty Cure alter ego of Kasei. In order to transform, she needs the Star Color Pendant and her Star Color Pen.

Attacks
Mars Strike (マーズストライク): Cure Mar's main attack, it requires the Star Colorpendant.
 * Aries Mars Strike (おひつじ座マーズストライク): Using the Star Color Pendant and the Aries Star Princess Color Pen, Mars is able to perform an upgraded version of this attack.
 * Virgo Mars Strike (おとめ座マーズストライク): Using the Star Color Pendant and the Virgo Star Princess Color Pen, Mars is able to perform an upgraded version of this attack.