Mona

Mona is an astrologist who takes her passion seriously. She is very knowledgeable in this subject in part and respects, yet also fears Barbeloth, her master, at the same time. She combines her astrology skills with hydromancy, which makes her a well-known, if still growing astrologist. In part due to her astrology, Mona can tell whether or not a person is lying, can sense their intentions from a single glance, being capable of seeing their fate and is able to accurately deduce a person's traits just from knowing what their constellation is. Being obsessed with astrology gives Mona a sense of pride, but this also serves as a double-edged sword; any Mora she gets her hands on is immediately spent on astrology-related materials, regardless of its cost. She only realizes too late when she has run out of Mora to meet her daily needs, occasionally going without shelter or food for days on end. She is particularly picky when it comes to eating, as she prefers simple dishes when eating out; when she cooks, she makes the most out of whatever she can buy. She does not tolerate those who disrespect her. She also makes a lot of denials when someone is pointing out what she doesn't have.

She has fair skin, pale sea green eyes, and waist-length dark purple hair that turns slightly red at the ends. Her fringe is uneven. Mona's hair is tied up with black ribbons into two twintails with two gold compass rose ornaments clamped onto the tips. Her accessories consist of a gold earring that resembles a compass rose on her left ear, a black choker necklace adorned with another gold compass rose, a gold ornament on her right thigh, and a large blue-purple witch hat, adorned with gold compass rose decals and ornaments. Mona wears a low-cut blue-purple backless leotard with a detached blue-purple sleeves on her forearms and black gloves, along with a short blue-purple cloak, buttoned with a gold compass rose ornament hanging above her chest. Her Hydro Vision is mounted on the back of her cloak. She wears black translucent tights decorated with four-pointed stars on her left thigh.

On occasion, Her accessories consist of a gold earring that resembles a compass rose on her left ear, a black choker necklace adorned with another gold compass rose, a gold ornament on her right thigh, and a large dark blue witch hat, adorned with gold compass rose decals and ornaments. Mona wears a dark blue strapless bodysuit cut at the bottom in the style of shorts. She has detached dark blue sleeves on her forearms and black gloves, along with a short dark blue cloak, buttoned with a gold compass rose ornament hanging above her chest. Her Hydro Vision is mounted on the back of her cloak. She wears either stockings or thigh-high boots that are dark purple, accented with gold, and turn into a lighter near the top.

Teyvat is a place where people of all sorts go about their business. Merchants move products, knights patrol, and farmers till the land. But if one were to ask Mona — the enigmatic and prideful astrologist — what she busies herself with, she will reply by saying that she is servicing a debt known as "life." She will, however, vigorously deny being "poor," giving the following explanation- "Beautiful veneers may obscure simple truths." Exquisite food may mask its nutritional value. "One lives simply, all the better to expose this world's truths." A frugal lifestyle, therefore, is a form of training to access the truth... Or so Mona will insist. Teyvat is a place where people of all sorts go about their business, and even an enigmatic astrologist must look to hers.

—That said, it seems like bards might be the exception to this rule. A mysterious young astrologer who proclaims herself to be "Astrologist Mona Megistus," and who possesses abilities to match the title. Erudite, but prideful. Though she is often strapped for cash and lives a life of thrift, she is resolved to never use astrology for profit... It is this very resolution that has caused her to constantly fret about money.