IT’S VERY IMPORTANT YOU KNOW TO CALL THEM LEGION FORMS. For REASONS.
Grace first combined forms while protecting Nanase and Ellen from the goo. It’s probably not super duper majorly important that she can do that or anything.
You don’t need to worry THAT much about laundry. There’s a wall that divides either side of the basement, and the laundry is on the non-mad science side, so it’s easy to be safe from it.
I probably took way too much pride in realizing that whole “Tedd + Grace = TG” dealie.