Mona is a much more powerful A-rank character in Genshin Impact. Read how to play and get Mona.
How to Play as Mona
SHE HAS AN ELEMENTAL SKILL – A WATER PHANTOM APPEARS AT THE LOCATION. MONA WILL BE EFFECTIVE WHEN ELECTRIC OR CRYO STATUS COMBINED. THE LATE BEFORE ACTIVATING AN ELEMENTAL SKILL LETS HER QUICKLY GO BACK BEFORE HIS CAST. SHE USES AN ELEMENTAL EXPLOSION THAT SHEARS SMALL OPPONENTS IN BUBBLES, INCREASING THE DAMAGE INCLUDED IN THEM.
How to Get Mona in Genshin Impact
Unfortunately, if she is not in the store (or she is, but you lack the star glitter), then you can knock out Mona in an exclusively random way using Wish. Similar to unlocking other characters.
Open Wish and examine the different banners, trying to find Mona on one of them. Then try to open it. Wish will be unlocked when you reach Adventure Rank 5 and interact with the Knights of Favionia in Mondstadt, your first major settlement.