Legendary Days is a monthly event that usually last for four days. During this event, the player must battle a specific troll to gain shards for a high-rarity girl. Each month, a new girl is being obtainable and alongside her, a rerun of previous Legendary Days girl also occurs. In addition, Legendary Gifts are also added as rewards for defeating specific trolls during the event.
Girls listing from Levitya up until Sai can randomly appear at Mythic Pachinko. Later girls however don't and can only reappear in this event, thought the exact pattern of rerun can be unpredictable.