What a tricky question! It could mean two different things, though: how they see you as a person, or how they feel when they're around you. Those can be totally different.
The first thing that comes to mind is the addictive, stuck quality of the Devil. For me that reads like they might feel they can't get enough of you, or like you've got a hold on them.
It can also be straight-up, magnetic attraction — they might find you irresistible, or feel like you're being seductive and pulling them in.
On the flip side, the card can mean they notice messy habits or obsessions, or basically see you as trouble.
Or maybe they see you as a rebel, someone who breaks the rules and would be exciting to get involved with.
If you want a clearer answer, try asking a more specific version of the question.
