Greetings Naughty Netherpunch, (By the way, I have wanted to ask you for a long time, what is the meaning of "Netherpunch"?)
I want to suggest to you some changes in Ryen's skills as I never use his skills because they are useless.
Indeed, Ryen is supposed to be the strongest in the party but he is actually rather useless in battles because his skills are inefficient. I mean, Kayelinth, who is supposed to be his pupil, has more powerful skills than him who is supposed to be the leader that everyone admires, follows and relies on, Ryen's magic is rather weak and needs to be significantly improved in order to fit his role as the leader!
So I thought about what skills may improve his usefulness and I came up with some ideas for you:
Instead of skills which add some elemental damages to normal attacks that I never use because the added damages are not worth losing a turn to add them, I would rather like some badass elemental attacks fitting the party leader like Hellfire, a skill which deals a high amount of fire damage to one ennemy and Black Hole, a skill which deals a high amount of darkness damage to one enemy. Also, Inferno, a skill which deals fire damage to all enemies, and Maelstrom, a skill which deals darkness damage to all enemies. Now we are talking!
Fire Recovery is just useless so I would say just scrap it.
Connection is useless as there are items and other party members who can heal way better but I thought about a skill more useful for Ryen's lovers. I thought about it as I was battling alongside Chiyo and kept using stimulants to get her back on her feet because she was easily knocked down. I then thought that she was really fragile and that I wanted to protect her. This is how I thought about a skill that I would like to use with Ryen and which would be way more useful than Connection as Ryen doesn't need to heal since , as I said, there are items and other party members who are way more efficient at that, what Ryen actually needs to be useful to his lovers is Love Shield. Indeed, there is a weakness to some party members which currently cannot be helped as not everyone can wear armors, which leaves some party members really weak to physical damage and knocked out easily. Chiyo has the Golden Shield which increases the magic defense of the entire party for the rest of the battle but no one currently has a shield to increase the physical defense, which leaves some party members too vulnerable. This is why Ryen needs Love Shield to protect his treasured lovers during battles, a really helpful skill instead of pointless Connection, a skill which completes Chiyo's Golden Shield, Chiyo protects against magic damage while Ryen protects against physical damage, a combined defense! Love Shield is a skill which grants a magical shield powered by Ryen's love which protects someone he loves against physical damage for the rest of the battle, the strength of this shield depends of the strength of the relationship between Ryen and the targeted party member, how about it? :-)
By the way, why did you name Trey's skill "Light Shield"? It is not a shield of light which protects against darkness, it is an attack which deals damage of light, so I think you better rename it Spear of Light, although Shield of Light, a skill to protect the party against darkness would complete Spear of Light nicely, don't you think? ;-) Which makes me think, why not grant to Ryen a Dark Shield skill to protect the party against attacks of light as well, how about it? ;-) And speaking of Trey, is he not supposed to be a paladin, a knight of light, a holy warrior, and Ryen's bodyguard at that? Then why has he always been so weak with his physical attacks?!? I gave up involving Trey in battles because his attack has always remained weak. I understand the weakness of Mira and Chiyo's physical attacks because their weapon is a staff designed as a tool for them to catalyze their magic power, not an actual weapon to hit people with it, but Trey wields a spear, not a staff! A spear is supposed to deal physical damage but his attack has always been weak, making him rather useless in battles. He definitely needs you to increase his attack to make him a worthy knight useful to his king!
Also, why is it Chiyo who holds a skill to destroy undeads? It should be Mira as she is an angel, a being of light, and we first met her as she wanted to exorcise a ghost in the abandonned barracks. So this skill should definitely be hers, Chiyo has no reason to be skillful against undeads, don't you think?
Hmm... About Mira's Panic skill, instead of making enemies less likely to target her, how about making them more likely to target her as she is seen defenseless but harder to hit as she runs around aimlessly? In short, a skill to turn her into a decoy. ;-)
There are some party members who are skilled with fire, water, ice, thunder, earth, darkness and light but no one is skilled with wind and I noticed that Mirel has just as much affinity with wind than she has with earth so I think that she deserves some good wind skills alongside her earth skills, for examples, Wind Arrow, a skill which uses the power of wind to shoot an arrow at high speed which is undodgable and deals high physical damage along with some wind damage to one enemy, Twister Arrow, a skill which summons a concentrated tornado around an arrow which deals high wind damage along with some physical damage to one enemy, Raging Wind, a skill which allows Mirel to summon a hurricane which deals wind damage to all enemies, Playful Wind, a skill which makes Mirel as volatile as wind, significantly increasing her agility, what do you think? And now that I think about it, how about Golem Skin, a skill which uses the power of earth to significantly increase Mirel's physical defense?
Also, why Chiyo doesn't know anything about fire magic? She is skilled with water, ice and thunder but doesn't has any fire skill. And this statement makes me think that you involuntarily have created a perfect opportunity for Chiyo to grow closer with Ryen. Indeed, what if Chiyo uses her lack of fire skill as an excuse to spend some alone time with Ryen by asking him to teach her about fire magic since he is skilled at it? You see where I am going with that, don't you? ;-) Indeed, by making Ryen a natural with fire magic and Chiyo a sorceress who has no fire skill, you just have created a perfect setting for Chiyo to learn fire magic from Ryen, isn't that great? :-D Chiyo might ask to Ryen to teach her fire magic, which would give her an excuse to spend some alone time with him, just like how she enjoyed to have him for herself when she asked him to help her gather materials for her alchemy and just like all of his lovers come with excuses to spend some alone time with him, and she would complete her elemental magic skills with fire magic skills, don't you like this idea? ;-)
I also want to say that Sandra has some cool skills, you were well inspired with her! :-D But why Shadow Strike doesn't give her TP even though it is an attack skill which consumes MP and no TP? Every attack which doesn't consume TP should give TP to their user. Chiyo gets TP whenever she uses a magic attack skill even though she can't use her TP as she has no TP skill. Which makes me think, how about Meditation, a TP skill for Chiyo which makes her medidate for a turn to regenerate her MP, meaning using some TP for a resupply of MP? Back to Sandra, her skills are cool and fitting to her character so I like them, but her Lucky Strike skill is way too weak as it delivers 3 hits at once but each hit is way weaker than her normal attack, making this skill useless. Considering the amount of TP required to use this skill, it is a rather costly skill whose current power is not worthy of the cost so you could well afford to let her deal a combo of 3 normal attacks at once against one random enemy with it, which would make this skill way more interesting to use. And since she started to learn magic of darkness, I would like her to continue her apprentissage and master new dark skills. Like for example Good Night, a skill to induce sleeping state to one target which breaks uppon being hit and wake up. As a thief, she would like to be able to make guards fall asleep at will and she would be more helpful in battles if she was able to neutralize enemies to allow the party to concentrate attacks on a specific target first, what do you think?