Yeah sure, just a note though, the annie quest I linked to was actually the twins by mistake! corrected now.
As for the Twins game, the trainer for the younger sister ( short haired one ) is in the house right next door to your own.
The one for the older sister is in the second town (the one after the forest) in the wooden house right down from where you meet the older sister if you're playing as the younger one, in simpler terms its in the south east corner BUT to access it, you must finish the side mission you get from the house in the very very northwest corner of the town, the man will say his daughter is sick and to talk to the medic that is located in the INN, talk to him, he will offer you a cure but it needs two white plants, one is located in the forest ( it's location SEEMS to be random, but it's a white flower that's usually near the entrance, it can be hard to spot , if you can't find it let me know and ill screen cap it) bring it back to him, he say's he needs a second one that he can sell you for 10,000 so you COULD grind gold up, or you could go to the wooden house I mentioned earlier as the YOUNGER sister first, go view the flower on the table, then talk to the man in the house, he will tell you to send in your older sister, so go out side, switch to her then go back in, he will say he will give it to you only if you promise to come back later. take the plant, finish the mission by going back to the INN getting the medicine and giving it to the father, dont forget to use the reward he gives you as it lets you use 2 passive abilities at once and they come in very handy later. Go back to the wooden house as the older sister and voila you have the second trainer
