I'm sure him and Medea probably got on well, simply because for Malfoy standards, Scorpius is sort of a rebel. He doesn't believe in the pureblood ideals nor does he care about the Dark Lords plans. And they'd definitely bond over clothing, because the one thing Lucius had any long term hold over is the fact that at his most casual Scorpius is in ironed pants and a polo.
Lasairiona Quiggly: Scorpius definitely needs friends that aren't concerned with his last name! And he could use someone who doesn't look at his OCD/perfectionist ways and think he's some kind of freak.
I'm not quite sure how well Scorpius would get along with Llwellyn, really. He doesn't believe in purebloods above others, nor does he care much for the Dark Arts. In fact one of his strengths in school was DADA. Not to mention the age and house difference.