Schmitt

Schmitt is one of the 10,000 players who were trapped in «Sword Art Online» and is a former guild member of the Golden Apple and currently a lancer of Divine Dragon Alliance's that is in-charge of leading it's defense force.

Chronology
During the events of A Murder Case in the Area he's afraid of Griselda's ghost, because he thought that she was going to kill him, after witnessing Yolko's death, he decides to visit Griselda's grave, where he confesses that he been given an order to set a crystal for Griselda's room and leave the crystal inside the guild inventory. This crystal helped the in the murder of Griselda, while Schmitt was given a large amount of money, which he used to buy the necessary level of equipment to join the Divine Dragon Alliance to feel safe, because of his fear of death.

It's presumed that Schmitt was logged out of the game after Kirito killed Heathcliff, prematurely clearing the game.