I don't normally like the haughty, arrogant, tsundere types, but I somehow like Regensburg a lot. Maybe it's just the fact that she's constantly losing SKK and engaging in massive cope about it. She also seems to be a fairly nice person for an allegedly arrogant aristocrat.

The fact that they didn't make her a completely overexaggerated titcow and have kept her body pretty consistent across her CGs also helps.