Girls Frontline 2 Cheats Free skins code [HA8AK912] Mods (unlock all characters). Trait is the core passive factor of a character. By sacrificing the character's memory (essentially pulling duplicates), these can be upgraded up to 5 times. Enhancing the traits of characters will also greatly improve their core attributes. Basic attacks are always free. Units can learn new basic attacks through level trees. Units can have up to three active or passive skills.👇