>>725609131
With regards to lore? Very important. With regards to game mechanics? Less so. There are a few times when she does help a little but it's few and far between. But what is a hero without something to protect? Roll and Dr. Light are Rock's family, they're the reason he can get hit and keep on fighting for justice. Returning to the lab after a tough battle and seeing Roll's relieved smile is the biggest power up of all.