- Ensemble Dark Horse: Bode makes a pretty good impression, with his natural courage and precocious nature, and often lampshading how his siblings aren't giving him enough trust and responsibility, given the situation. His using the keys to make a lightsaber also helps.
- Idiot Ball: The Locke kids neglect to mention that Dodge can't take keys from them when they let Ellie leave Key House with the key to the Crown of Shadows, which leads to a number of unpleasant consequences.
- Jerkass Woobie:
- Sam Lesser is one. He came from an abusive home and was manipulated by Dodge for her own ends, then had her mock him and what he did for her while he was dying.
- Eden comes on kind of strong, and doesn't exactly go out of her way to be nice to Kinsey, but she gets publicly humiliated with the Music Box Key while she has no idea why she can't control her body movements, then attacked by Kinsey's escaped Fear, is told that happened because Kinsey is afraid of her, a revelation she seems kind of hurt by, and finally, gets hit by a bullet that spreads demon infection during the season finale after having been trying to help.
- They Changed It, Now It Sucks!: Downplayed. Most of the changes have been greeted positively, but there are fans disappointed with the changes to Jackie's character (from Kinsey's best friend to Tyler's girlfriend) and the omission of Jordan. The absence of the ever-popular Giant Key, and the changes to Sam's arc and characters have also drawn a mixed reaction.
- Uncanny Valley: The CG used to portray Bode and Sam as a ghost is fairly doll-like—however, given the overall intention of the effect, it works.
YMMV / Locke & Key (2020)