Gists are just for you, to aid in your comprehension of the "cold" and "clinical" terms of the storyform. Use as many as you like!
And yes, that would be fine. Provided both of those characters' behaviors/actions are having an impact on the main character and how she is behaving/acting, you're good to go. The genius of the storyform is that it helps keep your illustrations of various storypoints linked to your intent. If you understand the way that those two character's behaviors/actions illustrate the same problem, then you can lean into those illustrations without worrying about your story flying off the rails.