Crutch Character: Firing off Gae Bolg is pretty good for clearing out Mooks, but later on when players try to fight the bosses later down the line, players then find out that they're underleveled because of missing out on the stat grinds and skill ranks are severely lacking. It also doesn't help that David only uses a one-hand sword which severely cuts the damage output that he could do. He's still a godsend however when players are going for a Low Battle Rank game.
Jack of All Stats: Even if she's initially more physically oriented, she handles magic quite well too. Her defaults (and uniques) weapons provide her good scores in both physical and magical power, and also enhances her protection against both types quite well.
Limit Break: Her Hundred Flowers Unique Art, which she can only uses when her union's Hit Points is below 30%. Also, her summon of Namul Niram and the Weapon Art Snowpetal (granted you gifted her the Nightbloom).
Peninsula of Power Leveling: Her quest in the PC version allows players to stat and skill grind like crazy. However, you'll have to sacrifice getting her, Emmy's Hundred Flower Limit Break, some items, and Jager.
Sadistic Choice: Either you get him for the Frostblade and deal with The Conqueror's Animacule attack or you finish the "At Hatred's End" quest and not need to deal with said attack. This is even more sadistic in the Xbox 360 version where if you didn't side with Ophelia and complete said quest, you can say goodbye to your 100% Completion.
Cloud Cuckoolander: Rather than heading towards Nagapur, she instead counts fishes at Crookfen. She'll still stay there even after the Time Skip.
Lost Forever: Did you unlock Underwalt before finishing The Fallen quest? Say goodbye to recruiting him, defeating The Fallen, and gaining access to the Ancient Ruins (the last one only applies to the PC version).
Overrated And Underleveled: He's a really great character who has decent physical and mystic art skills. Unfortunately by the time you do get him, players will be so overleveled because they would be level grinding against The Fallen which players need to defeat just to recruit him.
Curb-Stomp Battle: With Emma. She's a formidable warrior, but she didn't stand a chance against him. He just keeps parrying all her attacks, while calmly walking towards his objective, and finally dispose of her once he had enough.