Strange japanese expression

I turn to you for your expertise.

だけどあのいさちょんはあたし好みの偽善者だから

But that is the (???) of hypocrite I like.

My issue is with the "isachon", as I have not encountered it before. Perhaps you know? I cannot find it in my dictionaries or even online.

I'm a Japanese, but I have no idea what Isachon means.
I believe that there's no Japanese word "Isachon".
It sounds rather like nickname of someone named Isa-what like Isaki or Isayama.
Is there anyone named Isa-** around her?
I think he's male and he's refered beforehand in the conversation.

So the translation would be
But that Isachon(someone's nickname) is a kind of hypocrite I like.