The official website for the Attack on Titan Wings of Counterattack Online browser game will be running a special event through December 25th (Levi’s birthday!). The special event is called New Squad Levi Carol and will include seasonal items, santa suit gacha and a visual of Eren and Mikasa less than thrilled with their plushie gifts.
Visual of Levi in a Santa outfit:
Special event announcement items and info:
Official trailer for Attack on Titan Wings of Counterattack Online: