In Season 2 premiere itself : Gaea telling Omega Zell is currently doing his assingned task so badly that even Sparadrap is doing better than him. Omega Zell gets furious and says she went too far in her insults. Gaea briefly looks at a struggling Sparadrap and actually takes what she said back.
Can't be mentionned without spoiling Season 2's premiere, but really worth it : When Sparadrap has to create a new avatar and Omega Zell (only guild member available for it at the time) refuses to help him level up, Ystos shows up to help him and invites him into the Justice guild to be able to do so. Once that happens, Sparadrap's first reaction tell the news to his brother who's using a laptop in the same room as him:
Kevin: Whoua, it's great and you know why? I just got into Justice guild! And it's the most mega hefty of the dead guild in Horizon 1.1! But you can't unserstand because you don't know how to play.
Thomas: You're doing it on purpose or what? Kevin: What ? Thomas: You still haven't understood who Ystos the druid is? Kevin: Hmmm... no. [Kevin goes back to playing, cut to in-game] Ystos, to Sparadrap: It's me, Thomas. [Kevin turns away from his computer with a very surprised look on his face, looks at his brother's laptop over his shoulder, than back at his computer] Kevin: Wow... but it's amazing. I taught you to play Horizon 1.1 that well? That you became level 100? Like me? I'm a great teacher! (note : Kevin being level 100 is an innocent delusion on his part while Thomas really is level 100) Thomas [sighs]: Yes, sure. Now that you got it, we can go do the Mortegarde dungeon.
During Season 3, Morgan's (Omega Zell) latest real life job assignment gives him an excuse to meet the player behind Fantöm. He brings Gabrielle (Gaea) along for various reasons and she starts telling him about Fantöm-related rumors. One has it that the charismatic guy in the Horizon ads isn't the real Max Middle, who's actually horribly overweight because of his professional gamer lifestyle. The second one is that the player behind Fantöm is actually a woman. When Max Middle opens his door, Morgan's first reaction is "Yeah, he's not a girl nor horribly overweight!". Gabrielle's reaction is a nice little smirk.
Spardrap gets a Mirror Match in Season 3. He and his double keep missing each other with their attack spells because they have the same aiming skills.
The last action of the Omega Zell vs Gaea duel happening in the middle of Arthéon's wedding with Kary that was attendend by team Fantöm, Sparadrap, Couette, Golgotha, Spectre and part of the Roxxor guild and Omega Zell not taking losing in front of them very well.
Tenshirock's final plan includes a mash-up of several of his previous ones, including the one that makes the avatar say embarassing stuff with a voice identical to that of their player. The camera focuses on different characters while he explains the situation. When he mentions that the avatar can among other things mention the porn sites on which the player has been, the camera focus is on, of all people, Couette.
At some point during the second novel, part of the strategy used by Justice against an enemy includes ystos being asked to heal the enemy in question. In other words, the very move that usually marks Sparadrap as the worse healer of the game.
Gaea going all fan-girly on Mist after years of mocking Omega Zell's attitude towards Fantöm.