Here's the description of Halonah from the script:
Elementary-aged, inquisitive, imaginative and smart, with a vocabulary beyond her years, prone to anxiety and a strong need for order. The Alphabetastics are a performing group that lives in Halonah’s imagination. Letters and their shapes, music, sounds, and words are her bliss, and a source of comfort in her highly desired, well ordered world, and comfort when she becomes anxious.