Characters are beings who speak to the players. Often referred to as Non-Player Characters (NPC's), they will only state scripted lines either triggered by a timer, event, or character action. It is unknown whether more characters will be added to the game in future updates.
Maroo is a thief who helps the Tenno and the Lotus uncover the Arcane Codices after being hunted by her former employees, the Grineer. As a thief, Maroo's interests lay in anything that can help her obtain money and riches.
Bosses are targets in Assassination missions. They are stronger counterparts or high rank officials within their own factions and are outfitted with superior weaponry, higher health and shields compare to the normal infantry. Occasionally, bosses will insert a player's name or Clan's name in their taunts.