Meet Malice, the latest addition to Dungeon Boss! She's a fearsome fighter who is ready to take on the dungeons, and for the next few days she's elevating her fellow female heroes (including Lupina!) with increased stats! During this event, all female heroes get +10% ATK, +15% HP, and +20% DEF. In addition, there are four special event dungeons that you can only run with female heroes and several event quests.
Finally, Malice has already gotten settled into the VIP Portal, and Indigo is being featured in the Heroic Portal, where she plans to stay even after the event.
Update: Malice has decided to extend her welcome party by a few hours. Get those last few raids in while you can!