I am all for Leo using these abilities! Some things he might be able to see if he looks at Lobco are:

Her in her shrimp form, as it if technically her 'real' form.

She also canonically had bad luck. I'm not sure if this sort more conceptual thing would count, but it's not just by chance she's been in the situations she has been in.

Last would be another more abstract thing he might see is her connection to her witch and fellow familiars.