Imagine this:
Spider escapes from Quaritch only to end up lost and stumbling into the hands of an Ash Na'vi scout who immediately plucks up this strange little human and brings him back home to present to Varang. Without hesitation, Varang lifts him up to eye level, staring deep into his soul. After a long, silent moment, she deems him satisfactory and declares, with quiet finality, that he will stay by her side as her ward.