On Second Chance, Otto Goodwin (Adhir Kalyan) is a genius who knows how to bring dead people back to life as a younger, better version of themselves. Unfortunately, he's also insane. He brings them back just for the purpose of giving his sister transfusions so she won't die from her disease. Beyond that, he doesn't care about the people he brings back, or their families. At least he comes around later, but only after it's too late.
Over on The 100, we've got both a favorite and a least favorite. Octavia Blake (Marie Avgeropoulos) is definitely the favorite. She rides horses into the sunset and has decided to be mostly a Grounder because her own people have become pretty much horrible. That includes her own brother!
Ontari (Rhiannon Fish) is one of the least favorites of the whole show. She beheaded a child for goodness sake! And all so she could be the next Commander. Even the man tasked with making it official doesn't want this monster to have power.