Ruby

Biodata

Power Progression

Background and History

Ruby is the only heir of Duke Grendel and Lady Margaret. Before joining Himmel’s party, she studied under Serie, who taught her magic and the basics of fighting at close range with a staff 19 22.

Ruby encountered the future members of Himmel’s party while defending a village. She overwhelmed the demon officer Camilla, but let her guard down when she believed him defeated. Himmel saved her from his surprise attack and later invited her to join the journey against the Demon King 6 7 9.

Early in the journey, the king required Ruby to visit her estranged father. At the family estate, Margaret eased the tension between them, and Ruby shared an ancient family book attributed to Flamme with Frieren. The party stayed for about a month before departing 19 20 23.

After Frieren and Lowell’s group parted from Himmel’s party, Ruby continued north as its mage. She later reunited with them, and she and Frieren filled a ruined area with flowers in a friendly contest 98 147.

Himmel confessed his feelings to Ruby with a Mirror Lotus ring, which she accepted. They married in a cathedral ceremony alongside Lowell and Frieren 184 187.

Appearance

Ruby is petite, with fiery red curls and bright green eyes. At her first appearance, she looked about ten years old and wore a high-quality, oversized deep-blue mage’s robe 6.

• She later wore her longer curls in a high ponytail while traveling 142.
• At her wedding, she wore a diamond-studded white gown and a floor-length veil 187.
• She remained youthful-looking much later in life and jokingly claimed to be “eighteen forever” 279.

Personality

Ruby is energetic, proud, and fond of making grand declarations about her abilities. She enjoys praise, elaborate spell names, and visually impressive magic, even when the resulting displays are impractical 7 30 57.

She is eager to learn and persistently seeks lessons from stronger mages, though she struggles with lengthy assigned reading. Her curiosity can also lead her into trouble: she encouraged others to try an unfamiliar potion, contributing to a dangerous fight 9 44 304 310.

Ruby is protective of her companions and willing to see good in others. She offered Mina alternatives to eating people and stood by Lowell after learning he was a former Demon King, though Lowell cautioned her about trusting dangerous beings without the strength to control the situation 32 62.

Abilities and Skills

Magical Talent

Ruby studies a wide range of magic. Lowell says that at ten she had as much mana as an ordinary person might accumulate in approximately three hundred years, and compares her repertoire to a small magic library 131 133.

• Her mana is substantial but not limitless; repeated fire spells against powerful undead left her exhausted 33 34.
• She uses flight and high-speed movement to maneuver and evade attacks 6 47 60.
• She combines different attributes in a powerful composite spell, although it proves ineffective against Regulus’s Authority 460.

Offensive Magic

Ruby uses fire, ice, and arcane spells in combat, often calling out their names as she casts 6 30.

• Arcane Blast creates an outward burst around her; she used it to repel Camilla’s surprise attack 6.
• Arcane Missiles Volley fires multiple projectiles, but failed to penetrate Qual’s defensive magic 29 47.
• Rapid-Fire Flame Arrows struck soldiers threatening Heiter 33.
• She compressed her Flame Barrier into a line of white heat that pierced Camilla’s shadow shields 7.

Barriers and Battlefield Control

Ruby uses barriers to protect allies and control spells to restrict opponents’ movement.

• Arcane Barrier shielded Ruby and Frieren from a Gargoyle 29.
• Yellow Springs Swamp turned the ground within roughly ten meters into a bog, slowing undead soldiers and conserving mana compared with attacking them individually 33.
• Waterflow Bind: Fishing Net Barrier trapped fish for the party’s lunch 67.
• Her flame, ice, and arcane barriers could not withstand Qual’s Killing Magic for long, forcing her to dodge 47.

Flower Field Magic

Frieren taught Ruby to create a field of flowers. Ruby initially produced only tiny white flowers, but maintained a small field for more than ten minutes by the end of the lesson 13.

• She later covered half a ruined area with Cecilia Flowers and Blue Moon Weed during a contest with Frieren 147.

Staff Combat

Serie taught Ruby the basics of close-range staff fighting so she would not be helpless if an enemy approached. Ruby used the technique against a Goblin, striking its knee before finishing it with a mana blast 22.

Equipment and Items

• Staff — Ruby’s gem-tipped casting staff; she also uses it as a melee weapon 6 22.
• Notebook — Used to record her Flower Field Magic lesson 13.
• Cecilia Flower brooch — A birthday gift from Himmel 57.
• Mirror Lotus ring — Given to Ruby by Himmel when he confessed his feelings 184.

Relationships

• Himmel — Her traveling companion and husband. He saved her from Camilla, recruited her to his party, and later married her 7 9 187.
• Serie — Ruby’s master. Ruby seeks her approval and worries about her safety despite Serie’s frequent insults and dismissive manner 51 447 450.
• Frieren — Ruby’s teacher and close companion. Frieren taught her Flower Field Magic and agreed to teach her the basics of Killing Magic and its defense 13 50.
• Lowell — A companion who advises and teases her. Ruby accepted him after learning he was a former Demon King because of the help he had given the party 32 62.
• Duke Grendel and Lady Margaret — Ruby’s parents. Her relationship with her father was strained, while her mother warmly welcomed her home and helped ease the family’s tension 20.
• Fern — Frieren’s disciple, whom Ruby likes to tease. Fern later reprimanded Ruby for sharing the unpredictable potion so casually 304 313.
• Sense — An acquaintance whom Ruby affectionately greets and teases during a visit to Oysast 279.

Story Role and Major Arcs

• Journey north: Ruby fought monsters and demons with Himmel’s party, including Qual, whose Killing Magic exposed the limits of her defenses. Afterward, she asked Frieren to teach her the spell and how to defend against it 47 50.
• Frostwhisper Canyon: Ruby fell into an illusion of marrying Himmel. Although she initially suspected the scene was false, she became absorbed in it; afterward, she was embarrassed by the memory 81 85.
• Potion incident: Ruby found a personality-changing potion in an ancient ruin and encouraged Lowell to try it. The resulting battle endangered the group, and Fern later warned Ruby to handle unknown items more carefully 304 310 313.
• Serie’s threatened future: After Lowell’s vision showed Serie dying when her disciples were taken hostage, Ruby tearfully thanked her master. When Ruby claimed she could tell Serie was lying about not caring, Serie threw her out a window 447.
• Battle with Regulus: Ruby fought beside Himmel and Serie, but Regulus’s Authority nullified their attacks. He wounded Ruby’s shoulder; Himmel treated her with a healing potion, and Serie ultimately defeated Regulus 460.