Board Thread:General Discussion/@comment-28189972-20170228051259/@comment-4010415-20170425235523

They probably decided they didn't have time to try to do stuff with her and didn't try to find somewhere to smoothly insert her name. Apparently, they had Taiyang's name already planned early on, but we didn't get a name drop on him until volume 2, despite mentions of "dad" by Ruby and Yang in volume 1.