Waldemar was a brief lover of Lumi before she became the cruel Snow Queen But his innocent lover was slowly being seduced away from him by Jack Horner, who took any time to manipulate the situation in his favor. He than made Waldemar look like a fool by defeating in a battle, after he made a petty remark about his affects of Lumi’s wintery surroundings. After losing, Lumi had him sent away to one of her castles where she said she’d meet him since she’d be headed there for winter. He left his pride wounded, knowing Jack would steal Lumi.
Lumi then took Jack as her new lover, believing all his flowery words of love. That would be a mistake, as he was merely using her. When she got ill, she naively gave him her powers so that winter process would still move forward. However, Jack would prove unreliable and unfaithful. When Lumi discovered herself pregnant, Jack was quick to deny that he was the father. He still firmly believed that Waldemar was the father of her son. What became of Waldemar is unclear after she became the cruel Snow Queen. Though she most likely never saw him again as she had a brief lover with Captain Umil.