Klein

Biodata

Feature	Details
Name	Klein Prodia Greyrat (克莱恩) 163
Alias(es)	Dragon Knight 195
Species/Race	Half-elf; his long ears reflect his elven heritage. 163 174
Gender	Male 163
Affiliation	Sunless Empire; leader of the adventurer party Stone Sword 195
Occupation/Role	Eldest prince of the Sunless Empire; S-rank adventurer and party leader 195
Status	Alive 241
First Appearance	Chapter 163, “Master and Disciple” 163

Power Progression

Stage / Realm / Level	Chapter	Notes
Animal communicator	163	Born able to read the thoughts of animals and magical beasts and transmit his own thoughts to them.
Apprentice mage and swordsman	163 166	Becomes Dolin’s disciple, receives the Prodia Greyrat surname, and begins magic and Water God Style training. Dolin later recognizes that Klein is better suited to Sword God Style training under Ghislaine.
Sword God Style trainee	196	Continues sword training under an unnamed, highly skilled Sword God Style master; Klein later admits he is not yet strong enough to contend for the Sword God title.
Dragon Knight / S-rank adventurer	195 196	Leads the S-rank party Stone Sword and rides the Hydra Little Nine, whose combat power strengthens the party considerably.
Recipient of divine power	241	Receives a share of Hitogami’s divine powers after Hitogami’s death; the specific power granted to Klein is not identified.

Background / History

Klein was raised in the Great Forest by his mother, Elinalise. For his first six years, he had no surname; although Elinalise bore the name Dragonroad, she did not allow him to inherit it. She taught him languages and survival skills but refused to teach him magic or combat. 163

Since childhood, Klein could communicate mentally with animals and magical beasts. Small animals became his playmates, while larger beasts could often be convinced not to attack him. When a rabbit friend broke its leg, Klein sought a mage’s help and met Dolin Prodia Greyrat. 163

Dolin healed the rabbit and offered Klein an apprenticeship in magic and swordsmanship on the condition that he take the Greyrat surname. With Elinalise’s approval, Klein became Klein Prodia Greyrat. He learned magic rapidly by discussing elemental principles with animals, though his mana reserves remained low. 163

After Klein discovered Dolin and Elinalise’s relationship, he ran away into the forest with his animal companions. Dolin rescued him from a two-headed wolf, revealed himself as Klein’s father, and brought him back to his family. 164 165

Dolin continued teaching Klein magic, while Ghislaine trained him in swordsmanship after Dolin determined that Klein’s agile temperament was more compatible with Sword God Style than Water God Style. 166

Klein later moved to Avalon, met Dolin’s many children, and enrolled at Migurdia Magic University alongside Lara and Lucy. His long ears prevented him from being considered a successor to the Sunless Empire’s throne. 173 174

Appearance

Klein is a long-eared half-elf whose appearance visibly distinguishes him from the predominantly human imperial family. His elven features later bar him from succession despite being Dolin’s eldest son. 174 194

• Long ears inherited through Elinalise’s elven bloodline. 163 174
• Described by Sylphie as growing increasingly handsome and resembling Dolin in his youth. 197
• Retains a youthful appearance while contemporaries age, following lifespan-altering magic within the imperial family. 196

Personality

Klein is compassionate toward animals and reluctant to abandon even nonhuman companions. When the two-headed wolf demanded that he sacrifice the black bear or deer traveling with him, Klein refused despite the danger. 165

He is curious and diligent in study, particularly magic. As a child, he trained until exhaustion and used animals’ observations of wind, water, and nature to understand magical principles more quickly. 163

As an adult adventurer, Klein displays adaptable leadership. In unfamiliar environments—including a world without ambient mana or battle aura—he organizes his party into defensive formations and conserves their resources. 200

Dolin’s guidance during the Human–Demon conflict changes Klein’s view of war. He comes to understand that revenge alone cannot resolve the conflict and agrees to safeguard human refugees instead. 223

Abilities & Skills

Animal Communication

Klein can mentally receive the thoughts of animals and magical beasts, then convey his own intentions to them. 163

• Befriends ordinary animals, which accompany and assist him in the Great Forest. 163 164
• Can negotiate with magical beasts and sometimes prevent them from attacking him personally. 163 165
• Cannot guarantee the safety of companions; a starving two-headed wolf ignored his request and attacked his group. 165
• His affinity with beasts is suspected to be related to a Child of God talent. 166
• His connection extends to the holy beast Leo and to the Hydra Little Nine. 172 195

Magic

Klein began learning magic under Dolin and showed unusually fast comprehension. 163

• Learns by comparing Dolin’s lessons with animals’ practical understanding of natural phenomena. 163
• Can cast Water Ball, though his early spells lacked enough power to harm a C-rank two-headed wolf. 165
• Initially has low total mana, limiting sustained casting. 163
• In the other world, he cannot sense battle aura and must rely on internal mana rather than ambient mana. 200

Swordsmanship

Klein initially studied Water God Style but found its counterattacking focus unsuited to his preference for agile offense. 163

• Received Water God Style instruction from Dolin. 163
• Shifted toward Sword God Style under Ghislaine’s guidance. 166
• Later trained under an unnamed Sword God Style swordsman, who urged Klein to help reclaim the Sword God title after his death. 196
• Commands frontline formations as an adventurer, fighting beside Rishilia while Lara, Lucy, and Leo support the party. 200

Party Leadership

As leader of Stone Sword, Klein directs veteran adventurers in dungeon exploration and combat. 195 196

• Leads the party’s battle formation and assigns spellcasting and rear-guard roles. 196 200
• Uses Little Nine’s breath attacks as part of the party’s coordinated offense. 196
• Organizes the evacuation and resettlement of Millis survivors under Dolin’s orders. 217 223

Companions & Items

• Little Nine — A Hydra hatchling gifted by Dolin and raised by Klein. It grows into a ten-meter-long, winged magical beast that obeys Klein’s commands and aids Stone Sword in monster hunting. 196
• Eye of Identification — A Demon Eye previously given to Klein by Dolin. Its output can be monitored through Dolin’s Demon God Eye. 239
• Sword — Klein carries and draws a sword as a frontline adventurer. 197 200

Relationships

• Dolin Prodia Greyrat — Father and first master. Dolin gives Klein his surname, teaches him magic and swordsmanship, and later entrusts him with refugee protection. 163 165 223
• Elinalise Dragonroad — Mother. She raises Klein alone in the Great Forest and approves his apprenticeship under Dolin. 163 164
• Ghislaine — Dolin’s wife and Klein’s Sword God Style instructor; she trains him after Dolin identifies his aptitude for the style. 166
• Lara — Wife, university companion, and member of Stone Sword. She and Klein travel with the party across worlds and support each other during dangerous expeditions. 194 195 200
• Lucy — Wife, university companion, and member of Stone Sword. She and Lara maintain a close alliance around their marriage to Klein. 194 195
• Rishilia Superdia — Cousin, party member, and secret lover; their relationship is initially concealed from Lara and Lucy. 195 197
• Leo — Beast-kin woman, party member, and later secret partner. Klein’s animal affinity extends to her from her time as a holy beast. 172 195 197
• Rudeus Greyrat — Father-in-law. Rudeus dislikes Klein’s marriage to Lara and Lucy, while Klein nevertheless respects Rudeus’s willingness to fight for humanity. 197 237
• Little Nine — Klein’s devoted Hydra mount and hunting companion. 195 196

Story Role / Major Arcs

Apprenticeship in the Great Forest

Klein meets Dolin while trying to save an injured rabbit, becomes his disciple, and gains the name Klein Prodia Greyrat. His discovery of Dolin and Elinalise’s relationship prompts him to run away, but the incident ends with Dolin acknowledging him as his son. 163 164 165

Education and Adventuring

After moving to Avalon, Klein meets his siblings and attends Migurdia Magic University with Lara and Lucy. Following graduation, the three become adventurers together; Klein eventually leads the S-rank party Stone Sword. 173 174 194 195

Otherworld Search for Dolin

When Dolin disappears into another world, Klein leads Lara, Lucy, Rishilia, and Leo through a portal to find him. The group adapts to a world without ambient mana, reaches Tokyo and Dragon Nation, and eventually locates Dolin through Klein’s work with an online streamer. 199 200 203 204 237

Human–Demon War

Klein helps evacuate Millis survivors to the Central Continent and accepts Dolin’s assignment to gather human refugees, keep them alive, and later lead them back to the Millis Continent after Laplace’s defeat. 217 223

Final Conflict

Klein receives information from Dolin through the Eye of Identification while Dolin, Rudeus, and Orsted enter the Void World. After Hitogami’s defeat, Klein receives a portion of his divine powers and returns to the human world with the others. 239 241

Notable Quotes

“I’m sorry, Mr. Wolf, but they’re all my friends. I can’t abandon them.” 165

“By order of Dolin Prodia Greyrat, the first Emperor of the Sunless Empire, I have come to bring you all to the Central Continent.” 217

Trivia

• Klein is Dolin’s eldest son, but his long ears permanently disqualify him from inheriting the Sunless Empire’s throne. 174 195
• Stone Sword is notable for having no pure-blooded human members. 195
• Adventurers consider Klein among the happiest adventurers in history because he leads an S-rank party alongside his wives and companions. 195
• Klein’s first known magical beast companion was an injured rabbit he called “Mr. Rabbit.” 163