They met through Serena! After the whole affair with the Looker Bureau, Serena and Emma kept in touch and would occasionally meet up to battle or hang out. After hearing Serena talk about Emma, Shauna decided that she really wanted to meet this girl and so Serena brought all her friends to spend time with Emma in one of Lumiose’s parks one afternoon. Shauna and Emma especially hit it off, but Trevor was also intrigued by her Expansion suit, since he though the science behind it was interesting, as well as by the concept of the Looker Bureau in general since he loves solving puzzles and mysteries. Emma ends up staying in touch with Serena’s friends after that, but she and Trevor only really begin to grow close after Emma gets stumped on a case one time. Hoping to get a new perspective on solving the case, Emma remembers that one of Serena’s friends is good at solving puzzles, so she contacts Trevor for advice. They end up working very well together and collaborate on many more cases.

Over time, they develop romantic feelings for each other, but both are too shy to admit it at first. Once Shauna realizes that Trevor has a crush, she’s eager to help set the two up and arranges a date for them since she loves to play matchmaker. Though there are a few shenanigans from Shauna’s meddling, the date is successful and Trevor and Emma are able to confess their feelings for each other, starting to date officially. Eventually, Trevor becomes a member of the Looker Bureau full time and the two now run the detective agency as a married couple with their two children, Augie and Emilie. Trevor specializes in putting together all the information while Emma goes out and talks to people as well as confront criminals as Essentia. Looker, even though he is now retired, often stops by and visits them since he officially adopted Emma as his (second) daughter. He loves to dote on his grandchildren and is very proud of how successful Emma has become.