They're his maid
There are Hilarious moments which they appears in when they styled Wolfgang hair i was grinning and snickerin like crazy at the sight of it (≧∀≦)
Oh it was them! I didn't realise till you said it
Oh but that's kinda funny, her father is someone influential in the congress and his daughter is a maid? Shudn't she be a noble at least?
In noble times, royal families had higher up families as their servants--(like how the queens of england had ladies-in-waitings (basically their assistants/servants) that were from noble or rich families. This helps the nobility too bec they get to be closer to the royal family and can form good connections. This also props up the royal families' reputation. It was an honor for nobility back then to be chosen! Hope that helps
Excuse me...but who are these beautiful girls again? And what is their relationship with Shin and Wolfgang? The black-haired girl looks so much like Shin tho, maybe Shin's relative?