The two boys and the girl were introduced in the Regocnition Summer Special already ... at least there were very similar looking characters going with different names, tho. Those boys (Halu and Aupa) occured to me as members of a clique of youngsters - friends maybe but not family. The girl (Moli) was the niece of Anamara from Mender's Tale ... pictured as a leader type. Of course their background can have changed as much as their names in TFQ. As long as there is no prove otherwise in the story they are just friends and agemates for me who teamed up by chance during the attack.