From Wanderlust Adventures Wiki
- Enemies in Wanderlust: Adventures (rarely) drop Mercenary Contracts. These can be turned in to Leone in town, allowing you to purchase the corresponding enemy as a new Companion.
- Companions can be leveled up by gifting Materials to them (normally used to craft items at the Blacksmith or Jeweler) or with the more cost effective alternative, Fishing up "Gifts". (Gifts range from common blue to Unique purple. The only use is to grant experience to companions)
- You may rename your companion by speaking to the Mercenary, Leone, in town.
- Companions have hidden traits that differ by each companion, such as higher armor, ranged/melee attacks, elemental attacks, and hidden abilities such as dash attacks, invisibility or healing.