One of the things that kind of irked me about the DCAU version of Nora Fries is that we didn’t really get to see that much of her as a person, rather than as a thing for Victor to avenge or cure. This isn’t helped by her being frozen for all of her appearances, save for a non-speaking part at the end of the Subzero movie in which a team of surgeons and doctors hired by Bruce Wayne actually manage to finally cure her illness.
However, the comics set after the events of Subzero actually manage to flesh Nora out as an actual person and character, in ways that I thought were quite neat. For example, we know from what Victor told us that she was kind and beautiful… which was about it, really. But in the comics it’s implied that she was actually an accomplished biochemist in her own right (Clayface impersonate her to trick Victor into making a serum, and since most of the work was already done prior to Victor’s involvement, logically Nora must have had some experience in the field in order for Victor to buy the scam in the first place).
And, after her second husband (one of the medical team that helped her recover from her cryogenic sleep and surgery) turned out to be framing Victor for a series of murders to keep her from doing back to him (even hiding the letters Victor wrote to her from Arkham), Nora promptly dumped his ass. She then tracked down Koonak, the Inuit child Victor had adopted prior to Subzero after saving his life, using some shrewd detective work, and then hiked off into the Arctic Circle to find her lost ex-husband.
Those are the kinds of things that SHOW why Victor is so madly in love with her, rather than just expecting us to accept it on his word. Without the extended canon, Nora’s a just a prop in Victor’s story, something to motivate his actions. WITH the extended canon, she’s an actual person who you’d believe Victor would go through all those lengths to get her back.
Which he did… for like five minutes before Batman accidentally blew him up, and his living severed head discovered by someone working for the father of the Batman Beyond villain Blight. But still!
The continued post-the New Batman Adventures stories of Victor and Nora can be found in Batman: Gotham Adventures 5, 40, 50, and 51.