With the focus on the Sirens, Borderlands 3 introduced another character that players didn't get a chance to meet in person, and that is the Siren Nyriad. She was the reason why the Eridians are dead and the Destroyer was imprisoned on Pandora, and players discover these details via logs.
LilithLilith is one of the playable characters in the original Borderlands and she is also the first siren we got introduced to. In the first game, Lilith is able to Phasewalk, she can leave this dimension for a short time.
To gain exp just hit mobs with the attacks and you can check the exp in the ki technique screen. If a technique has leveled up you get an upgrade point and you can spend it to upgrade the technique. You can change DBC config to change the exp gain for ki attacks and also you can change now the ki attacks cost.
Zeno was stated to be the eternal and highest ranking god that could never be defeated and never surpassed by anyone or anything. Zalama created the Super Dragon Balls, of which the dragon can grant absolutely any wish. It could be the same for Zalama and Super Shenron. So I'm going to say that Zeno is superior.