The Bigbot robot is the wild symbol. It is four positions high, it can land on the middle three reels, and it will substitute for all of the other symbols, except for the scatter symbols, to help and form more winning combinations.
The blue robot light is the scatter symbol.
Whenever the Bigbot wild symbol lands partially on the reels, there is a chance that it may be nudged to fill the entire reel and help to form more wins.
If two or more full Bigbot wild symbols land on the reels then the Bigbot Respins are triggered. The number of respins you win is equal to the number of triggering symbols. During the respins, if another Bigbot wild lands fully on the reels then you receive an extra respins. All of the wilds will remain on the reels for the duration of the feature, but they will change position at the start of every spin.
When three of the robot light scatter symbols land on the reels, you win eight free spins. During the free spins, not only can the Bigbot wild land on every reel, but also if it only lands partially then it is guaranteed to be nudged into place. Better yet, every Bigbot wild that lands fully on the reels awards you one more free spin and the wilds remain on the reels for the duration of the free spins.
There is a top payout of 400x for landing five wild symbols along a payline. Matsuo can payout up to 300x, Danielle can payout up to 200x and Joaquin can payout up to 120x. The two smaller robot symbols can both payout up to 80x while the yellow and bronze cogs can payout up to 50x, and the green and blue cogs can payout up to 40x.