Being a vampire now and at the rank of a blood sucker, there was no way Ingrid's physical body would remain the same, and she must have obtained some racial skills also. Aldritch wanted to test all these and see what kind of skills and abilities she unlocked, as much as he could. Though, it was still early for her to realise and control her skills, so Aldritch wasn't eager, instead, he was more interested in how physically stronger she had become.
Since others didn't have systems, there was no way he could compare what her stats used to be and what they were now to see if the change was much or if there was any change at all. he could only go off of her performance against him… then again, he wasn't sure what a normal human's stat would be… 'Maybe it would be 10? Or maybe 5 for a normal human.' He wasn't sure, but even then, he would be able to tell if she was stronger than what your everyday lady is capable of.