Name: (Tristan) (Allison)
Age: Tristan is a year older than you and Allison is his kid sister so find out later on
Species: Tristan is secretly a Nix but he hides it well and Allison would be a Serina (god I hope I spelled that right)
Powers: (um.. Whatever Nix's and Serina can do)
Looks; they both point up there
Other: Allison has a pet bunny and Tristan had a pet mouse. You know both of them.
Scenario(s): you're friends or whatever you're making yourself to them, Tristan and Allison have been fighting and you said it can't be that bad to have one of them for a sibling, so Tristan tells you to take Allison and have her as a sibling for a day. You..
2) Same as scenario 1 only Allison told you to take Tristan and have him as a sibling for a day. You....
3) make one up