His own expression is smug to match Eridan's. Even as Eridan grabs his shirt and pulls his expression doesn't falter. It isn't until the seadweller begins talking that Sollux's expression begins to change. At first he's surprised, though he's careful to hide it, if for only a second as Eridan begins to speak. He's honestly shocked Eridan picked up on so much, but that feeling is short lived. As Eridan pulls him in again, the only thing he's left feeling is anger. His expression shifts from smug back to hate filled as Eridan continues to push him around.

He didn't expect any pity from Eridan, and he didn't want the other troll to feel any pity for him either. Though he'll never admit it, it's respect that he's afraid of losing, both his own and whatever amount small amount Eridan ever gave him. So even though the purpleblood says he won't look down on Sollux, the former psionic simply isn't capable of believing it. Honestly the sentiment has him near laughing.

"You aren't going to look down on me?" Sollux asks with a sardonic grin. He laughs, unable to and unwilling to hide just how funny that is to him.

"You already do! You literally just called me a 'worthless fucking mustardblood' not even two seconds ago!" His grin is sardonic, but as he continues it begins to change to a sneer. The things is, despite how much of a joke Eridan's entire speech is, there were still some things he had been right about. Was it wrong not to tell him? He hesitates.