TitleLord of Illusion
He served as a prominent character for Elyos characters in earlier game expansions, spearheading the Elyos advance into Balaurea and later being involved in the faction's dealings with Dragon Lords Tiamat and Beritra. After the 6.0 update he takes on lesser role, acting as somewhat of a mentor figure to new and promising Daevas under the guise of a fake identity.
He is gloomy and reticent, and symbolized by illusion, fear, and the Spiritmaster class.
Advance on Balaurea (2.0)
At the start of the 2.0 update Ariel, while asking her subordinate how is the fight is going in Tiamaranta, reveals that Kaisinel is the commander of the Sanctum Expeditionary Force and that his mission is to destroy Tiamat. However, according to Vaizel's reports, he is having a difficult time not just because of the Balaur, but also because of the Asmodians and Marchutan. To this end the player is asked to lead a reinforcement unit into Inggison. During this time the player is acquainted with several of the Lord's agents, but not not meet Kaisinel himself.
The player's first encounter with Kaisinel is during the Sarpan campaign, where his voice orders the player to assist Kahrun in a bid to keep the Reian leader away from Siel's Relics. He appears in person in the final battle against , where he saves the player as even in the maw of death they refused to yield to the Dragon Lord. After the player neutralizes Tiamat's control over Siel's Relics the Dragon Lord becomes weakened, allowing Kaisinel to overpower her and ultimately slay her with his special attack.
Dark Betrayal (4.0)
After the conclusion of the events pertaining to Siel's Relics Kaisinel turns his attention to the newly discovered land of Katalam, which has already fallen under attack from Dragon Lord Beritra's forces. In order to lure out Beritra and discover his intentions he takes the player, who is currently unconscious after an Asmodian attack, and puts him/her in a state of suspended animation for six months. During this time Kaisinel and his agents experiment on and reprogram the player's brain with magic to make him/her extremely gullible and agreeable, which should serve as the perfect bait to lure Beritra out. After this plan failed the player confronts Kaisinel, who offers the player an explanation but refuses to lift the magic or apologize.
After the 4.8 update it is revealed that Kaisinel went missing during the Upheaval. A sidequest for Elyos characters later reveals that the Lord is still alive, but overexerted himself during the catastrophe. At this time he resides in a special realm while slowly recovering his energy.
In the Abyssal Winds update (4.9) Kaisinel summons the player to the realm in which he now resides. This time however his personality is in contrast with before, as he actually acknowledges the player's efforts and skills. He gives the player his personal seal and appoints them as the temporary commander of his Kaisinel's Wings Legion, ordering them to lead his elite legion in the charge against Dragon Lord Beritra in the Drakenspire Depths.
After Kaisinel learns of the player's prowess in battle and the way he/she honored his fallen Agent Killios, Kaisinal expresses his gratitude to the player for the first time. In the aftermath of these events one of his agents remarks that this was the first time she had ever seen the Lord trust someone else, let alone express his gratitude, and suggests that the player may have a positive influence on the Lord.
A New Dawn (6.0)
After the 6.0 update Kaisinel takes on a new identity, Kaisys, and appears in Akarios Village in Poeta as an instructor from Sanctum. After affirming the new player's potential he sends him/her and their childhood friend Roye towards Sanctum to ascend to Daevas. After this time he remains in Poeta, but offers the player a helping hand with discovering the game's features at times.
- Throughout Aion 4.0-4.7 Kaisinel could be seen and freely talked to in-game in the secret chamber in the back of Kaisinel's Beacon in Katalam. This feature was unlocked after the player had finished the campaign quest line for this map.
- It is suggested Pernos is aware of Kaisys' true identity in the 6.0 update, and is working with him.