[Event] Charity Letter

- Description: Send a letter of thanks. ※ Right-click to send a Charity Letter to friends or acquaintances. Adventurers who receive a response will be sent [Event] Lara's Gift Exchange Coupon via Mail. ※ This item will be removed during the June 14, 2023 maintenance. ※ Please refer to the Events page on the official website for more details.

- Additional use requirements are not yet decoded; this is not a complete eligibility check.