1.) With the memory of her patron flooding back to her, Thimble would want to know what exactly she bore witness to. Unfortunately for her, that question on its own would spin off into several more questions that would likely be unanswered. How did she of all people get pulled through a rift in reality? It was clear by Elathera's expression that Thimble wasn't supposed to be there. Was it an act at the hands of unseen forces or merely a strange coincidence?
2.) Disorganization. Despite her chaotic nature, Thimble works best when upholding routines she's learned from her family. Everything she owns is categorized and documented. All of her tools are sanitized twice daily. If there are observations to be made, she'll do so and keep records of her findings. Alchemy is science, and science has steps to follow to ensure quality research. Disorganization is detrimental to her work, and Thimble takes great pride in the things she does.
3.) When she's truly seeing red, any sense of formality is dropped. She curses, she yells, and she threatens violence towards the source of her anger. Thimble shakes like a bomb that's ready to blow, and it isn't uncommon for her anger to turn physical.