So today I was looking through the Oblivion Construction Set for NPC dialogue files, when I stumbled upon something peculiar. I found a piece of dialogue that every NPC has, but it's only said by Thadon in the Shivering Isles expansion. I found it rather odd that every NPC has this, as it's a rather specific piece of dialogue. The dialogue goes as follows; "You. Of course. Sheogorath's Assassin." This is said by Thadon in the The Roots of Madness quest, but every voice actor has done this line. Here are a few examples:
Altmer, Bosmer and Dunmer male:
Altmer, Bosmer and Dunmer female:
Dark Seducer female:
Dark Seducer male:
Golden Saint male:
And yes, even Sheogorath himself.
I don't know what this could mean, but it certainly is strange. Any thoughts on it?