Typical conversation between them
"My, aren't you knowledgeable, Senjougahara."
"It's you who's ignorant and incompetent, Araragi-kun."
"The word 'ignorant' has a nice ring to it, so I don't mind being called that, but 'incompetent" is going just a bit too far..."
"Is that so? Then I'll just use 'pathetic' next time."
"Senjougahara: Don't call me "this chick"
Araragi: Then what should I call you?
Araragi: SEN - JOU - GA - HAA - RAA - SAA - MAA
Senjougahara: I don't like the way you say it. Say it properly.
Senjougahara:"If i kill you i will be the one closest to you on your death bed, isn't it romantic."
Araragi:"I don't want that kind of twisted love"