When first starting, you will eventually reach the 20 person limit of the character box. Power up your favorite characters by sacrificing extra crew members that will not be used. If you do not have anyone to power up or need Beli, sell your extra crew members. Note: If needed, spend a rainbow gem to increase your character box by five slots. Go to the details page of each character and look at the top left corner to view their category. Some cards are classified as "boosters" or "evolvers". Boosters give a lot of experience and sometimes stat boosts when used to power up existing cards. Evolvers are catalysts that cards require when you try to evolve them to their next form. Make sure to save the evolvers and use the boosters on your favorite cards. Your ship can be upgraded in the shipyard if you have enough cola. Different types of ships affect your crew in various ways. Upgrading a ship improves its ability.