Yumina has chest-length blonde hair with heterochromic (one blue and one green) eyes, which result from her Mystic Eyes. Before meeting Touya, Yumina wears a dress for a royal attire. Later when joining the guild, Yumina begins to wear the clothes given to her by Elze and Linze, consisting of a white blouse under a purple jacket with a blue ribbon, and an indigo-colored pleated skirt.[12]. Sometimes (particularly when fighting), She wears her hair in a braid with a light blue ribbon. She also wears two golden ornaments in her hair, which slightly resemble the astrological symbol for Earth, reflecting a possible theme in Touya’s wives’s clothing.
Mystic Eyesof Intuition- Eyes that allow sight of the true nature or personality of any person a user sees.
Foresight (未来予知,Mirai Yochi?) - Yumina's "Dependent Trait" (眷属特性,Kenzoku Tokusei?). As a "Dependent" (眷属,Kenzoku?) of Touya Mochizuki, she is bestowed by Touya's divine power with an ability to see a few second into the future[13].
Magic - Yumina is normally able to use 3 attributes which are wind, earth, and darkness but with the engagement ring from Touya Mochizuki, she can use null magic as well[6].
Summoning - Her aptitude toward dark type magic has grants her ability to use summoning magic. She is contracted to 3 kinds of beasts which she can summon, but in the Light Novel the only beast shown is the Silver Wolf meaning that the other beasts are unknown as of volume 4.
Marksmanship - Yumina is skilled in the use of long range weaponry (such as her bow and gun), and has exceptionally good aim. this is sheen when she shot the hinges of a Bloody Crab with “expert precision” with her gun[14]
Revolver Handgun[19] - Yumina received a handgun from Touya which is made of Dragon Horn. Because it is made of Dragon Horn, the gun is lightweight but its durability is stronger than ordinary iron[20]. The handgun is modeled after Colt Army M1860 with size adjustment to fit Yumina's hand.
Rubber Bullet[21] - Yumina received rubber coated silver bullets which is enchanted with 【Paralyze】Null Magic from Touya.
Crystal Bullet[22] - Yumina received bullets made of crystal material which is enchanted with 「Explosion」 from Touya.
Engagement Ring[6] - Yumina received diamond ring made of platinum metal as engagement ring from Touya Mochizuki. The ring is magically self-fit and also enchanted with 【Accel】, 【Storage】, and 【Transfer】 by Touya which allows her to utilize them.
Sacred Ring[24] - Yumina received platinum gold ring from World God as wedding gift which was given through the great spirits. The ring is a sacred treasure which can act as receiver for Touya's divine power.
Trivia
No speculations and rumors, just fun facts!
Yumina wears her hair in a braid far more often in the Light Novel than in the Anime or Manga.
Yumina wears Earth Astronomical Symbol on her bow-tie and hairpin.
Earth Symbol on Yumina's bow-tie.
Earth Astronomical Symbol.
Her eyes are also the colors of Earth (blue and green)
She is the one who proposes the idea of sharing Touya with Elze, Linze, and Yae during their first day in the Belfast Mansion.[25]