Nina (Christine Ko) is another new character in season two. She's taken over Bunny's job as board president, and Howard warns Charles, Oliver, and Mabel that she can't be trusted. But Howard is also acting shifty.
In episode three, we find out that, as the new board president, Nina has huge plans to change the Arconia, modernising and monetising it. Bunny is furious when she finds out, and they get into a massive fight. But after the murder, when Nina goes into labor, she seems legitimately upset that Bunny isn't here to meet her child, and she tells Charles, Oliver, and Mabel that she wants to kill Bunny's murderer herself. She seems like she's telling the truth. Plus, in episode eight, she's clearly in her apartment throughout the blackout, meaning she's not chasing Lucy through the building.
Our verdict: Not guilty