Breather Level: The last storyline dungeon is significantly easier than the work getting into it.
Cliché Storm: It'd be easier to list the number of Gundam and JRPG tropes the game doesn't invoke.
Demonic Spiders: The Kamikaze Raven. Randomly encountered mid-game, it has low health but insane speed and melee damage. The result is that it always moves first, has an insane crit rate and hits hard enough to instakill whoever it targets. The only way to counter it is to use an always-moves-first boost or Counter Snipe, otherwise a Total Party Kill will ensue in three turns.
Goddamned Bats: As noted by the Let's Play, anything with short-circuit inducing attack, it stun you and unlike overheat, you can't even switch member or cast item and tech.
Tear Jerker: Gavenger's death and Tremmie's reaction to it - especially with her fully knowing that it was her brother's betrayal that got him killed. The soundtrack during and after doesn't help either.