Can you answer for Rikuo?
Okay, so this will be another long one.
Favorite thing about them
I like a lot about Rikuo, hence why he's my favorite in Gozyuger. I like how he's hardworking, artistic, caring, kind, determined, and willing to hold onto hope. His suit is so beautiful and I love his fighting style and his Leon Buster 50. I'm also such a big fan of him being protective of the freedom of others and I do wonder if that will pertain to these next episodes, as it seems he's sacrificing his own freedom, something we've seen he doesn't want to do as he doesn't want to be restricted or restrict others. I think it's a very important aspect of Rikuo's character and can bring about internal and external conflict, as we can see with both Kuon and Rei. I generally also really just really value how kind he is. The fact that he's the one that thinks it's their responsibility to protect people since they have the power to do so was something that really caught me. He tries to be thoughtful of others and sometimes he falters, but I do think he has good intentions most of the time. I like that he checks in on people when he sees they're upset, I like that he respects the boundaries others have placed even if it takes getting used to, I like that he holds onto Hoeru's ring, I like that he brings Sumino the water, I like that he gives Bouquet a flower, and I just like how Rikuo is Rikuo.
Sidenote: I'm also a big fan of him having enhanced hearing and his ears wiggling when he hears something. Unfortunate for him that his red is a very loud wolf that loves to howl, but fortunate that they have a bond that makes the bit of pain seem worth it. His singing voice is also very nice.
Least favorite thing about them
I don't really have anything I dislike about Rikuo. He has his flaws, but I don't find them to be annoying or frustrating in the slightest. I feel like a lot of things in the story happen for a reason and I rather see those fleshed out before passing definitive judgement on the actions of characters that I do not yet understand as I lack the context of the situation. This is in regards to his betrayal and actions that may stem from this choice by the way, not something he has done prior.
I'll give you two, one he says often and one I think about a lot:
"Shall we dance?" - This a line he says from time to time and I do post audios of him saying it when he does. He says it in battle situations mainly, and I just find it endearing.
"I... Have no interest in being restricted, or restricting others. I'm going to tear through boredom and free myself!" - The lines where Rikuo talks about restriction and/or control always stand out to me, but I chose this one as I feel like it's important for Rikuo as a person. His own internal battles with restriction and control are something I think may be explored further soon, as I've stated before and I am keeping this statement from episode 11 in mind for reference.
Sumino and Rikuo have great friendship vibes. Rikuo is a very thoughtful person and it was clear that he felt sympathy when Sumino told them about Oto. He's willing to be open to talking so that she may come to trust him, even offering to have his mind read, though Sumino has no interest in touching him and her powers won't work when he has a contract. I like how he protects Sumino from the No One and opens up about his dream and a little of his past both for the sake of winning and likely also bc he feels comfortable enough with Sumino to do so. I like that Rikuo sees Sumino being upset about the situation with Oto and talks to her, not belittling her feelings but making her see that Oto really is a good person even though they didn't have the time to grow up together bc it was snatched away. I also find it telling that Rikuo asks Rei to free Oto as he knows that Sumino and her family love and miss her. There's a possibility that he may be working with Rei in part to help get Oto back as well, and so I find his friendship with Sumino to stand out. They just seem to care about each other, not in a romantic fashion, but as friends. Also quite fond of how Sumino refers to Rikuo as "Byakuya".
I do like Ryugi and Rikuo as friends as well. I actually cannot see them as being anything other than platonic. They have a good energy together and work well as they both can be quite silly in some aspects but are also quite serious at times. I haven't really seen any Precure, but their dynamic being compared to a pair of friends in Precure does have me intrigued.
I also find Rikuo's relationship with Bouquet to be compelling, but seeing as they are keeping a boundary of just being an idol and a fan, I prefer to not categorize them as romantic at this time, though I do see the appeal. I do like their dynamic, though it may not fit under BROTP, I did want to mention it.
It has always been Rikuo and Hoeru. I talked about them in depth in Hoeru's answers here.
Some of the scenes related to them that I like in chronological order (?)
From the main series are:
Rikuo introducing himself to Hoeru
Rikuo insisting that there's no need to fight right away, and that they should use their power to protect people
Rikuo choosing to fight by Hoeru's side instead of waiting to take his ring
Rikuo patting his shoulder, as if beckoning Hoeru, while saying it's convenient if they're all close by
Rikuo showing up at Hoeru's job with a rose and explaining the ring side effects, while also calling him "Wan-chan"
Rikuo showing Hoeru the ballot where he was voted for
When Rikuo pulls up to the battle in episode 4 and Hoeru looks so sick of his antics
Rikuo and Hoeru sitting in the cafe as Rikuo makes his drink and Hoeru sucks from a flower
Rikuo asking if Hoeru is embarrassed when they play house and telling him how he can soothe his embarrassment
Rikuo defending Hoeru's right to live as he wants as all people do when Kuon asks the Gozyugers to stay away from Hoeru
Rikuo saying they'd be upset without Hoeru like if they lost their dog while returning Hoeru's ring to him
Rikuo looking in amazement as Hoeru fights Fire Candle in Tega Sword Deka Claw
Hoeru rushing over to Rikuo after he's thrown from Tega Sword Blue
When Rikuo says he won't let Hoeru steal the spotlight
Hoeru checking in on Rikuo after he notices he's a little off and telling him he'll show him how he plays tag - especially how Rikuo perks up when asked about what he's planning
Rikuo saying that Hoeru really is interesting and choosing to be free and saying he doesn't wish to control others
Rikuo shooting the kalimba from Gaia's hands so he can't control Hoeru anymore
Hoeru telling Rikuo his singing wasn't bad and letting him borrow Deka Claw
Rikuo returning to normal and asking if Hoeru needs help
Rikuo sympathizing with Hoeru and giving his all in the relay race with him while they chant "Number one" over and over
Hoeru and Rikuo getting poisoned together and Hoeru looking to Rikuo right before his end and then looking to him again when they awaken
Rikuo trying to help out Hoeru by writing what he should do on a date
Hoeru checking out Rikuo's nails after he's turned into a gyaru
When Hoeru asks what Rikuo's doing after he turns on the team
Hoeru holding Rikuo by the waist as he fends off the BoonBoomger FLT promotion
Hoeru watching as Rikuo explains the Zangla Sword
Rikuo asking Sumino if she has clothes Hoeru can wear as the mistress when they dress as butlers
Hoeru feeding Rikuo onigiri
Rikuo doing the sports day events and Hoeru being really glad he's willing when everyone else was disinterested
Rikuo and Hoeru playing tug-of-war
There are probably more that I just cannot recall at the moment, but I'm very fond of them and their dynamic, whether it be platonic or romantic.
[Previous Hoeru musings and Rikuo musings]
Rei & Rikuo is an absolute no to me. I find it gross as Rei was likely an adult when Rikuo was a minor and they knew each other well at the time. Rei is also abusive and makes Rikuo uncomfortable in a way that really unsettles me.
He wears earplugs at times to ease his sensitive hearing, especially when he's in loud places
Always carries a marker to sign autographs
Carries cough drops to help lubricate his vocal cords
Keeps up with his skincare and hygiene, and wears a nice cologne or perfume (Bouquet notes in episode 15 that he smells nice)
Can get carried away at karaoke
Has a lot of outfits ready that he'll probably never need but he has them (one of his skills according to the episode blog is quick changes)
He designed or at least assisted in the designing of his merch
I disagree with the notion that he is a "womanizer" or a "fuckboy". I don't think that a character having charisma and being flirty at times makes them fit within these categories, especially since Rikuo's flirtations are often part of his idol persona and being friendly, not because he is trying to pursue a relationship. He's also very mindful of other's feelings and does not wish to hurt people or step on their boundaries, as we have seen with Sumino, Hoeru, and Bouquet. He is very caring, charming, and thoughtful and I feel like people don't understand what a "womanizer" or a "fuckboy" is and should probably reel it in and realize they may be misusing said terms.
Song I associate with them
My Rikuo & Hoeru and TXT agenda persists with Blue Spring and Cat & Dog.
Here are 15 that I really like right now:
Send me a character and I'll list