Hot take but if Will made himself more approachable or put himself in a position of accessibility, I think Franklyn would have grown obsessed with him as well. In my eyes, Franklyn is the type of person with whom if you pull back, he is drawn further in. The more secrets you hide, the more he wants to cling to you and endear himself to you. He wants to be special to you, so you have to be an especially picky person. He’s intuitive so he’s good at subconsciously weedling under the persona, and I think s2b-3 Will is very secretive and quiet and a perfect target.