It's because your amity was low and so your pet grew restless and left.

If they die they lose amity and when it gets below 20 they would leave you

First you need to get elin in the well in holy vilage you need a rope ladder too, but you
need to be Lv 20 to finish it.Second you will get Elin's gun when you are Lv 30.And Third
Lv your elin as same as your Lv so you and Elin will work together and her amity will be
higher and higher when it Lv and Lv up.

the guy abov posted rong place?? lol? get red thread and they wont run away!

Your pet's keep running away because of low amity. when you fight creatures higher level
then you then your pet has a great chance of dieing. and the more your pet dies the lower
the amity gets :)

DONT KEEP ELINS AMITY low ok? becuz if she got the gun and leave your team....... U will
never get the gun. and its ok if Niss have the wand. You can always get it in the tree. I
got 4 of Niss' wand. XD