"The stupid jellyfish had the nerve to get mad at me though for it! Me! I paid for yet another sword for him and he gets mad at me because it turns out to be a singing sword. He's lucky I didn't fireball it." Lina pretended to be oblivious to Sylphiel's hopeless daydream moment.
Really, Gourry's a great guy and if Lina stepped back and were honest for a second, she'd admit she felt basically the same way, but Sylphiel just was... blind to Gourry's faults sometimes.