Your ninja has six equipment slots. Each piece of gear for those slots can be upgraded by spending gold. Enhance your gear to get better stat boosts. They can only be improved up to your hero's maximum level. Faen are the small companions that will follow you. They provide passive stat boosts, and are important to improve your character. You can equip up to four of them, provided you at a high enough level. There many ways to improve your Faen. The most important one are the combos. Tap on a Faen to view their details. Notice the combo list button. If you pair a Faen with another Faen in that combo list, you will get bonus effects.