IKR!? If it weren't for Malphas, he'd be off the deep end. If Halphy's not happy, Lucy's not happy.
That works for me! Sedna would most certainly back away very quickly at Enyo's blood frenzy, though it wouldn't keep her from talking to her on later occasions, even if it severs their ties during this event. She'll want to make sure she's safe later.
At that point, she would be so grateful to see Cyrus! They'd be a cool team, because if she gets like a water bottle filled with liquid, she can probably throw shards of ice at creatures. She'd be freaked out when he first morphs, but she'd think it was cool.