If Lucas and Athanasia has a child, it would be the mc

gosh, i really wanna see their children now aND THEY'RE NOT EVEN A COUPLE YET OOF-

Its most likely due to the artwork of Spoon's from WMMAP being traced.
Although, the artist hasn't got the proportions accurate to be on the same level, certain angles like the profile view of the characters the linework looks identical to WMMAP. Even the style of clothes and shoes.
It can't be a coincidence.
What gives it away as tracing, is the similarities but lack of accuracy when drawing the characters in their motion and poses, because the artwork isn't authentic.