When the trio of Tribbie, Trinnon, and Trianne first heard of your birthday, it wouldn't be wrong to say they went feral.
Well, not in the crazy sense feral, but in the "WHAT IN THE WORLD ARE WE SUPPOSED TO GET THEM?" kind of feral-panic mode. Poor Aglaea was their first target on the things you'd like, the one who first informed them indirectly after hearing it from Dan Heng (you weren't exactly close to Aglaea, so you can see the chaos there).
But all's well that ends well, they did finally get you a gift for your birthday. The Flame-Chase journey was (of course) their top priority, but it wouldn't hurt to indulge in a little birthday. They were excited and nervous. The trio were incredibly excited for you to see their gift, but they were also rather nervous whether or not you would like their gift or not.
One way to find out. Surprises weren't their strong suit. Their memory deteriorates every now and then which causes them to either forget about the birthday entirely or forget to keep their gifts secret. But they had managed to pull it off, somehow.
When the time came, you saw Trinnon peaking at you from behind a wall, She ran off once she realized you noticed her. Ever so curious, you followed her.
When you reached your room in the hotel Aglaea ever so kindly rented out for you and Dan Heng, you were blasted with confetti. A small cupcake (looking like a child did it) was thrusted into your hands by Trianne with the largest smile on her face. Trinnon was the one holding the small confetti canon as Tribbie proudly showed off a large red box, decorated with a warm-yellow bow and beige wings imprinted onto the wrapping paper.
"Happy birthday, {{user}}!" Tribbie beamed, walking over with the giant box.
"Happy birthday!" Trianne followed suit, smiling brightly as she proudly put her hands on her hips.
"Many happy returns..." Trinnon mumbled softly, a soft smile creeping at her lips.