"Theres a woman, not Effie, calling the names in 12, but she still begins with "Ladies first!"
-Katniss describing Euphemia during Catching Fire.
Euphemia is an escort for District 12 during the early Hunger Games. She is the wife of Justinus Trinket. She is also the mom of Effie Trinket. She is a very upbeat character, and just like many other members of the trinket family, she loves fashion. She also plays as one of the bigger characters in Rummage's story.
Euphemia married a man named Justinus Trinket, and they were a famous couple back in their day as they were not only bankers but also sponsors and investors of Capitol News.
5th Hunger Games
During this time, we get to know that shes been District 12's first escort. She has golden hair, and she looks like she could be in her 30's, but her makeup makes her look a decade younger. She picks Rummage Lorman and Emilia Jones. Nobody voulenteers for any of them. Even though there hasn't been a winner at this time, she still has hope that they can win. Her personality is very similar to Effie's, her daughter. She is very happy to know that District 12 finally has a winner.
Justinus and Euphemia had a daughter at this time also named Euphemia, but called her Effie for short. Euphemia and Justinus Trinket were a famous couple back in their day as they were not only bankers but also sponsors and investors of Capitol News. This was very unusual, since they had their child at such an old age, Its unknown if Effie was picked on or not, it she probably wasn't, since she went to to best schools where not many people went to.
During this time, when Katniss and Peeta watch Haymitches Games, they see a woman, not Effie, calling out the name of Haymitch, Maysilee, and the other two tributes that participated in this year's Games. This is Euphemia.
Euphemia dies aging during The 71st Hunger Games. This let her daughter be in charge after her death.