An infiltrator's Will is only very, very subtly different - if the Oracle read someone's Will before an infiltration and after, and was looking for the change, it might be detectable as... hmm. A new color in the mix. Like the difference between a pure indigo color and an indigo with a drop of blue paint added.
An Infiltrator Persona would look like a whole different Instagram filter of the same painting.
A Mark would only show an effect on a Will if they were being actively pinged by their Arcana and drawn to a particular place or action, something that happens very rarely.
Lupa would lack the information to be sure, but the best guess is it would be like a Merge - a brief glimpse would be relatively safe, a deep dive would be disaster.
More specifically, Lupa'd probably know that while he's acting as the guiding voice of his generation, he should not be the first to take that risk.
Re: Council of Senpai, Double Valence-Era - Lupa
An infiltrator's Will is only very, very subtly different - if the Oracle read someone's Will before an infiltration and after, and was looking for the change, it might be detectable as... hmm. A new color in the mix. Like the difference between a pure indigo color and an indigo with a drop of blue paint added.
An Infiltrator Persona would look like a whole different Instagram filter of the same painting.
A Mark would only show an effect on a Will if they were being actively pinged by their Arcana and drawn to a particular place or action, something that happens very rarely.
Lupa would lack the information to be sure, but the best guess is it would be like a Merge - a brief glimpse would be relatively safe, a deep dive would be disaster.
More specifically, Lupa'd probably know that while he's acting as the guiding voice of his generation, he should not be the first to take that risk.