Heroic BSOD: Gets one after Master Xandred targets him and the other Rangers are hurt protecting him. He runs off for a few days and tries to avoid putting them in harm's way.
Lethal Chef: She doesn't think so, but the rest of the Rangers attest otherwise - though like with Mako, they're too polite to do so to her face (Kevin, for example, has the decency to throw away her burnt chicken while she's not looking).
Too polite... or too scared. We've seen her use her Samurai katana to slice a squash to bits, they might just feel it's not smart to offend somebody with samurai training and easy access to knives.
However, Negatron proves she is at least afraid she is. The insult he used to send her flying was "lousy cook", and she later asks everyone if she really is that bad. As stated before, they deny it not to bring her down more.
Even Emily is wary of her cooking (remember that, in the original, Kotoha thought Mako was flawless even in this department); in "Team Spirit", she goes so far as to cautiously ask if it was Mia who baked her birthday cake.
Noodle Implements: We never learned what she was planning to cook, but we do know it involved combining oysters, chocolate sauce and Brussels sprouts in a very specific way.
It's Not You, It's My Enemies: A platonic case. Because of his Ranger duties, Mike has to tell his friends he won't be able to hang out with them for a while. Additionally, it's implied that all the Rangers are forbidden to see their families until the enemy is defeated for this very reason. It's mentioned he even had to skip his graduation.
Ms. Fanservice: As much as she can be on a kids show hounded by Moral Guardians. Ever since the start of Super Samurai, her civilian outfit has consisted of very short shorts.
Large Ham: Even for Power Rangers. Sure, the Sentai footage of Genta would have looked like Stock Footage Failure otherwise, but it still takes a lot to be considered a Large Ham in a franchise that's already a World of Ham.
Team Mom: He cooks, cleans, and generally looks after the Rangers as if they were children (especially when they're sick). He also cries at weddings.
You Look Familiar: Rene Naufahu was previously seen as Emperor Gruumm, including a single scene in a single episode out-of-costume.
Bulk and Spike | (Actors: Paul Schrier and Felix Ryan)
Advertised Extra: Their screentime all season is quite minimal despite being billed as main characters. They're lucky to appear more than once an episode.
Bald of Awesome: Bulk's gotten rid of his trademark ponytail in favor of this.
Butt Monkey: Poor Bulk. He just doesn't catch a break sometimes.
Call Back: In episode 3, Bulk wears clothes similar to what he wore in the old days, namely a jean vest and a bandanna.
Demoted to Extra: At least, in comparison to Bulk with Skull in the good old days. They've only occasionally gotten caught up in monster attacks and have almost never interacted with the Rangers in their civilian identities. That said, it's still better than Bulk's handful of cameos in Power Rangers Lost Galaxy.
Honorary Uncle: Bulk to Spike. At least we think it's honorary...
Hopeless Suitor: Spike likes the Pink Ranger - like father, like son. Only in Skull's case, he had a crush on the girl not knowing she was the Pink Ranger. Spike initially focuses on the Pink Ranger herself without knowing who is wearing the helmet and suit. He later meets and gets a crush on Mia out-of-morph, forming a Two-Person Love Triangle of sorts... with Mia herself being none the wiser.
Not Even Bothering with the Accent: She retains her New Zealand accent, while the actress who plays Emily's younger self clearly has an American accent.
Soap Opera Disease: In "Sticks and Stones," it's revealed that she contracted a (yet-undisclosed) disease that resulted in Emily taking her role as Yellow Ranger.
Terry Watanabe | (Actor: Jaever Santos)
Cool Big Sis: Sees Mia as cool enough to sing in his band
Secret Keeper: Knows why Mia had to leave home, and who the other Rangers are. While it's been unusual in the past for siblings to know that their brother or sister is a Power Ranger, it's explicitly a lineage-based thing this season, so it's not so out-of-place.
Scott Truman / Ranger Operator Series Red | (VA: Tobias Reiss)
Fake Shemp or possibly Stage Names: Tobias Reiss does a good enough job of sounding like Eka Darville that some have theorized that it is really him under a pseudonym.
Law of Chromatic Superiority: He's the only RPM Ranger who is involved in the story of "Clash of the Red Rangers".
Authority Equals Asskicking: He's dealt with Nighlok trying to usurp his thrown with relative ease, has proven more powerful than Serrator, and when he finally comes out himself in "The Master Returns", he beats the hell out of the Rangers with absolutely no effort. While drying out! It's clear the Rangers would be in deep trouble if he could actually leave the Sanzu River.
Big Entrance: In "The Master Returns", his arrival on the human world is accompanied by a storm blacking out the sun, and rocks assembling themselves into a door with red light shooting out of the gaps that explodes when he emerges from it.
Orcus on His Throne: So far, he hasn't done anything except yell at people. The Rangers don't even seemed all that concerned with him in particular even though he's supposed to be the Big Bad. This is, however, completely in-character with his Sentai equivalent.
He has actually gotten off his duff and attacked Deker for "meddling in his affairs" that concerned the Red Samurai Ranger, if that counts for anything.
He also attacked a Nighlok who had been scheming to overthrow him.
In "The Master Returns" we find out why he's not taken action himself, the moment he steps foot on the human world, he begins to dry out rapidly and dries out so badly it takes him out of commission for presumably some time.
Roaring Rampage of Revenge: After learning Serrator had been deceiving him, he comes to earth himself and proceeds to go on one of these. The only reason he didn't wipe out everyone then and there was he dries out much more rapidly than a normal Nighlok, forcing him to retreat.
Sealed Evil in a Can: Was sealed in the river by Jayden's father. Due to the seal being done wrong (which stems from the previous Red Ranger having insufficient power at the time), it causes him headaches.
The Master Returns seems to imply that he's still trapped to some degree, as flashbacks show he could previously leave the Sanzu River without drying out instantly, a problem he has now.
Took a Level in Badass: Slowly but noticeably Xandred gets stronger and more powerful throughout the season. At first he was just Orcus on His Throne, but later he becomes much more menacing and active threat: he once summoned an entire army of moogers to terrorize city and destroy Red Ranger, he became much more aggressive, attempted to kill Deker and almost did, brutally punished Arachnitor and his moogers attacks have became more vicious. And he is the only one who can actually defeat Serrator.
Villainous Breakdown: Nearly tears the ship apart in a blind rage when he discovers the Red Ranger is the one who sealed him away and Jayden could do it again. He gets so furious, it causes enormous numbers of Mooks to spawn and it takes a much larger dose of his "medicine" to settle him down.
Octoroo | (Voice actor: Jeff Szusterman)
Badass: Held his own in a straight up fight with both the red ranger and the gold ranger
Deal with the Devil: Sold her soul to save Deker's life. She wasn't told until after the deal was complete that she doomed Deker to become a half Nighlok and forget her forever.
Don't You Dare Pity Me!: She doesn't want Mia to pity her when she finds out that Mia saw her past.
Happily Married: She and Deker were a married couple until a fire came down and killed Deker...and now Deker doesn't even remember her.
Hidden Depths: In "There Go the Brides", she seems to have bad wedding memories that motivate her to carry out the episode's plot.
Recent episodes such as "The Blue and the Gold" and "The Tengen Gate" hint that she and Deker have some history.
Disney Villain Death: At the end of his battle with Jayden, he's defeated and falls off a cliff.
Half-Human Hybrid: Explaining why he's able to come and go at will between Earth and the Sanzu River without drying out. He got this way by Dayu making a Deal with the Devil to save his life.
Happily Married: He was married to Dayu until a fire broke out, killed him and Dayu sacrificed her soul for him to live...only to forget her.
Deal with the Devil: The devil making the deal, in this case; he's the Nighlok who cursed both Dayu and Deker.
Makes another one with them later to fix their respective weapons in exchange for working for him.
The Dragon: Swears his loyalty to Xandred, though he's shown the occasional sign of being The Starscream.
Early-Bird Cameo: Twice, oddly enough. First was in Dayu's memory/dream in "Broken Dreams", and later in the flesh in the early-aired "Clash of the Red Rangers".
Genre Savvy: In "Kevin's Choice", his plan hinges on the Rangers destroying Scarf's first form to allow him to become his stronger second form.
Knight of Cerebus: The series wasn't exactly lighthearted, but Serrator and his Nighlok are even more viscious and vile than those that came before. Not only that, he's one of the most powerful enemies the Rangers have faced thus far.
Kick the Dog/For the Evulz: In his official debut episode, "Something Fishy", in order to show his power to Master Xandred, Serrator destroys an entire army of his own moogers.
Mook Maker: Seems to be able to spawn Moogers, like Xandred. Can also use his claws to cut a sheet of paper into the giant Papyrax.
Wolverine Claws: While his fingers are pretty damn sharp already, he can also enlarge his entire hands for more power, as seen in his first scuffle with the Rangers.
Conservation of Ninjutsu: The Moogers' difficulty seems linked to the number of them. In "There Go the Brides", a small group of them are able to give the Samurai Megazord a good deal of trouble without a Nighlok backing them up, where the larger groups normally supporting the Nighloks are taken out much more easily.
Covered In Slime: Antberry, to the point where it spills over to nearly everything he touches.
Deal with the Devil: Doubletone's whole schtick is making (and later breaking) promises in exchange for his victim giving up his/her dream.
Detachment Combat: Taken to an extreme with Splitface, who can explode into dozens of ricocheting spheres. Mike described it as being "like dodgeball with teeth".
