I absolutely love this scene. It’s not about how the geeky blonde manages to stop a robot from killing someone with placing the chip back into its spot while the others physically try to stop him.
It’s how she looks at this chip.
I like to think that when either Tadashi, Wasabi, Honey Lemon, or GoGo felt like giving up on their inventions and try something else after each failure, the others encouraged that person to keep trying in their own unique ways.
Hiro wasn’t at the lab where Tadashi worked effortlessly to bring Baymax to life. But the others were. Especially Honey Lemon. I can imagine her bringing an extra meal or two (probably his favorites) because Tadashi stayed overnight in the lab to keep working on BayMax. I can see her trying to persuade him to step away from his project and go take a shower at the facility to freshen up at least. I can see her coming by his station, making sure he eats and drinks what she brought him because they’re his favorites.
I can imagine Honey Lemon is excited for him to finally have gotten BayMax working after the 84th test when he tells her and the rest of the gang.
Hiro disregarded that chip because of hurt and anger towards Callaghan, not realizing the potential of that chip becoming broken.
Honey Lemon saves it, not only to save a human life from being killed by a robot who was created to heal, but because she didn’t want the time and effort Tadashi put into the original purpose of BayMax to be forgotten and lost forever. The chip is more than data and programming, it’s the essence and memories of Tadashi.