Um, isn't this supposed to be Lappland and her parents? As in, her biological father and mother, not all females? Am I wrong?

The kid sure looks like Lappland, though if it weren't for 100% of kaleka's other art here being from Arknights I could've also easily chalked it up to be coincidence, the other characters, the commentary and the replies to the twitter post doesn't feel necessarily like being Arknights related