The origin for Yuma dates back in 2020, when the pandemic was just starting. I was in my room, bored, thinking of what to draw. then I had an Idea. I watch a lot of earth to echo, and i like furries, so why not create an anthropomorphic cat robot. so i did that, I drew up a reference sheet, put the age and birthday, but all that was missing was a name. I looked on google translate for a Japanese name and settled on one called "Heiki" Which stands for weapons in Japanese. But 1 month later i decided against that and went with the name, "Yuma Akio" because it kinda suited him better. now i originally planned for it to be just yuma, but then i decided, "hey, yuma needs a sister." So, i then created an older sibling to yuma with cyan hair, pink fur, the brown robe and staff. Now her original name was Akari Kokoro, but it sounded like akari was adopted, so i later changed it to Akari Akio to better fit her family name. now the whole idea with yuma was to be this robot sibling who has been regular before being taken away by some agency and being turned into a robot, but i wanted him to stay the way he is and let him live his life with akari without any tech being injected.