Ariella Third is one of Professor Third's daughters and Ingrid's elder sister.
Once while their father was down with a cold Ariella and Ingrid stayed home to nurse him back to health, Ariella spending time in the kitchen fixing soup[1]. After tasting it, she remarked, "Needs more aloe". She later ended up catching her father's illness before, in turn, passing it on to her sister.
Ingrid had mentioned her a few times. Once in answer to Fillmore's question if she had any siblings[2]. Another was when the rapper "Checkmatey" asked if she had a sister and if she looks like her[3]. Ingrid replied, "Taller".
Notes[]
- She is voiced by Tara Strong.