リカ is a character created by professional managaka 春城秋介 (Shunjyo Shusuke)
Follow/support 春城秋介:
https://x.com/shunjyo_shusuke
https://www.pixiv.net/en/users/535606
https://shunjyoshusuke.fanbox.cc/
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG51888.html
https://ec.toranoana.jp/tora_r/ec/cot/circle/2UPAdE6P8V7MdD69d687/all/
https://shunjyoshusuke.fanbox.cc/