Considering Kasuga Maru/Taiyou isn't actually their child, this probably shouldn't be tagged with Science Babies. But still, she can be their adopted daughter so it's all good.
Edit: Actually wait, nothing in the original post actually mentions that as being Kasua Maru, so that may very well be their science baby so disregard what I just posted. Danbooru has her tagged as Kasuga Maru since the girl in the picture does look a lot like her though. What do others think?
last edited at May 14, 2017 1:05PM