Needed: completed the sidequest concert for none
reward: Reine summon.
When you have defeated or payd te kidnappers in the spidercave. Walk back to the entrance. Here stand the girl with the blue/green hair. You let her confess that she is one of the kidnappers. Now she runs away into the spidercave. Try to find her (as this is random) location, you need to search for her.
talk to her again, she tells you that she needed the money for her to go back to her brother at Snowvänia She will join you. Go the the Wester-Isles and push the stone if you didn’t already to go across. Then go to the cave and walk your way through it. At the forgotten castle garden, a converstation starts. If you want you can go through the door of the forgotten castle for some information about the hidden sheep level, if you want, else move along don’t go through the wootang village because she can’t be seen. So make your way through the forest to the north side and from there go to the east at the world map.
Take her to the Shnaps Inn, you have to because you can’t go any further. A scene appears where she talks with her brother. He asked if she already have looted him / her. After the converstation you are both returned to the world map. Go to the east through the the lvl 5 gate there is another conversation about this event. Then go to the ice-cave. You are getting straight to the ice temple where the entrence is to Snowvänia. A conversation happens again. And Reine becomes a summon to get your trust back.