Ensemble Darkhorse: Though drastically different from her OVA counterpart, TV Ifurita was apparently popular enough to be included in a radio drama taking place in OVA continuity (an alternative sequel to the second OVA), under the name of "Ifurina".
Evil Is Sexy: Diva could easily pass for a human were it not for her wings and antennea. Otherwise, she appears to be a beautiful, shapely woman with a tan, which seems utterly lost on Jinnai.
Franchise Original Sin: Makoto's status as a Chick Magnet and the accompanying harem antics. In the original OVA, they were a sidebar that provided fanservice and didn't hurt anything, but by The Alternative World, Ifurita was temporarily out of the game, the writers had completely run out of ideas, and their attempt to turn the show into a Tenchi-standardromantic comedy was probably the biggest reason that Alternative crashed so hard.
Ho Yay: Galus and Nahato, which is an disturbing example since Nahoto physically looks and sounds like a child.
Idiot Plot: A lot in El Hazard 2: The Magnificent World. There are so many moments, you'd swear the cast was playing professional volleyball with the Idiot Ball. A few examples: The group believing Katsuhiko's obvious lies despite Nanami's warnings (keep in mind that Nanami is his sister, and would know him better than everyone else), Makoto still trying to negotiate with the Obviously Evil Kalia despite her trying to kill him mere seconds ago, the Muldoon Priestesses combining their attacks into one projectile against a character who reflects projectiles, and so on.
What an Idiot!: In the TV Series, Nanami managed to become friends with the Bugrom and even with Queen Diva. So they will stop being evil, right? Well, that would be happening if Nanami didn't crush in front them a baby Bugrom, thinking this was just a normal insect. (But don't worry, it recovered quickly.) Thus, the Bugrom locked her up and stayed evil, and that was exactly as Jinnai planned!
Jerkass Woobie: TV Jinnai, where we go a little more in depth to what makes him tick. During his childhood, everyone prefered his neighbor Makoto and his sister Nanami and he was often alone. Granted, his Jerk Ass nature still means he brings it on himself, but in some ways this makes his situation somewhat more understandable.