Leo is the most valuable symbol, rewarding you with 2,500 coins (or 250 times your bet) and 5 on the payline. It appears on 3 intermediate reels (2, 3 and 4) and also expands to take over the entire reel. However, once the reel is wild, it remains locked for the duration of the feature! If you get them earlier.
As mentioned above, this is a win-win game, which means you can win when you get a combination on a continuous reel from the leftmost or rightmost reel.