Elias Hackblade

" ! Blood of my hidden fairy clan! To crush the enemies before me, lend me your strength!"

- Elias Hackblade, Log Horizon 9: Kanami, Go! East! chapter 1

Elias Hackblade is a Blademancer-Ancient Elf Lander and the "hero" of Elder Tale lore. After the Catastrophe, he was nearly sealed and killed by a monster when Kanami arrived and saved him, prompting him to join her on her journey to Japan in order to find out what happened to the rest of the Ancients.

Elias is among the most famous Landers, being stated to be as renowned as the White Wing Princess, Rin Shanfen. He is also a member of the Red Branch Knights, one of the thirteen chivalric orders

Appearance
Elias is described as having the appearance of a hero, having chestnut-brown hair and eyes, donning a "snow-white armored coat" that had indigo accent lines. The anime changes his hair color to blonde.

Personality
Elias seems to be a rather jovial person, not batting an eyelash at Kanami's dynamic personality and spontaneity. However, he draws the line at being called "Eri-Eri," a nickname she insists on calling him because it's "cuter."

Prior to the Catastrophe
Elias was known as the "Hero of Elder Tale," and was featured on the box art for the game. In Elder Tale lore, he was protected by a deity known as the Sword Prince, and raised by fairies, from whom he learned his techniques. He was born from a fairy and a Human; as a result, he is a Shunned Child, something that has given him a deep sorrow. Because of the  curse, he cannot directly kill a monster, only lower them to a certain amount of HP.

The Sword Prince
The Sword Prince is known worldwide as the originator of the “Fairy Arts” and for being the guardian deity of the famous hero Elias Hackblade. The Sword Prince does his best to pull the strings of the young hero, embracing the impression that he is a bossy god by asking players, “Adventurers, save Elias with your strength!” The prince will occasionally request various items from adventurers as well.

The Sword Prince is either a pure-blooded Alv or an elf who is said to have silvery hair and whose gaze contains all the colors of a rainbow. However, there is a possibility that this is not the Sword Prince’s true form, since the god only appears when he can be silhouetted in the dim light. The only thing people are completely certain of is that the prince wields a two-handed great sword.

The Catastrophe
Because the fortune teller Smirthi Marra's darśana told the Ancients that "a great destruction was approaching Theldesia," the knight orders banded together to take on the Genius who were being sealed in the Fortress of Destruction. Because the seal was coming undone, they planned to rush the enemy when the seal broke and catch them off-guard. However, the Ancients themselves were ambushed when the seal somehow broke eight hours early, and the Genius utilized their "words of death" to drive the Ancients into insanity and then death.

Elias ordered the forced activation of the Transport Circle to the inside of the Fortress, even though doing so would drain all the power from the City Transport Gates (which is also why the Adventurers found them inactive after the Catastrophe). Although Elias stayed behind to buy time for the main attack force, he ended up listening to the words of death and was only barely saved by Kanami.

Go East! arc
Elias and Coppelia appear when Kanami decides that Leonardo should join them on their journey to Japan. He greets Leonardo cordially, offering him a handshake after Leonardo shows signs of recognition of him. A member of the Knights of the Red Branch, one of the Thirteen Chivalric Orders, Elias is a Blademancer specializing in Fairy Arts and a descendant of royalty.

Kanami calls him "Eri-Eri," only for him to tell her not to call him that. Leonardo is shocked by how familiar the two are with each other, as well as how Elias had left the server he was usually on. When Leonardo is distracted by Coppelia and getting healed, Kanami and Elias leave to go fight monsters.

Trivia

 * Elias shares a birthday (July 7) with Akatsuki.