1) Erindor (Who else?) A human/dragon hybrid, will have wings and possibly firebreath, any other unique things I can come up with. Swordsman, great melee combat fighter. May not be main character.
To elaborate on opaltiger's beef with this statement, yes, naming a character after yourself is generally considered to be one of the primary indicators that the character is likely to be a Mary-Sue or Gary-Stu. Theoretically, you could have named yourself after the character, what with you having apparently come up with this a year and a half ago, but the point stands: why would you really name yourself after a character you've created unless you honestly consider that character to be in some way representative of yourself? Characters representing yourself are very dangerous territory. They're always at risk of becoming wish-fulfillment.
Now, I also have a kind of an issue with the "human/dragon hybrid" part. How, precisely, did this happen? Half-elves or half-orcs work because humans, elves and orcs are all approximately the same shape and could be concluded to be related species; it's not that much of a stretch to think they can interbreed. But humans and
dragons? Dragons are reptiles with a third set of limbs and fire-breathing, for God's sake; how are you suggesting they can breed with primates? Just the size difference makes the idea considerably squicky. If you didn't think of it that way, I assure you that your older readers will.
And how would the hybridization work, anyway? Right now he sounds like you're just making him a human with a couple of bonuses that happen to be derived from dragons. Hybrids don't work that way, even if you could somehow argue that dragons' genetic material is compatible with that of humans. To be a hybrid, he would have to be exactly half dragon and half human, not a human with pretty wings and fire-breathing abilities. But no, that would cause your character to be very freaky-looking and have a whole world of problems. You don't want that, do you?
Honestly, why do you really want him to be a half-dragon? To make him cooler? It sure doesn't
sound like his half-dragonness is about to have any impact on the storyline from what you've told us. See, I could forgive you for the illogicality of dragon/human breeding if this had some actual effect on things. Maybe if Erindor were shunned as a disturbing freak and a product of the unholy union of man and beast (come on, this is medieval times - of course he'd be considered a demon child and probably be murdered on sight), or if his mother was raped by a dragon and he wants revenge, or whatever (okay, those would be clichéd, but you get the idea), I would accept that him being a half-dragon is an essential part of this particular story and that it just requires some suspension of disbelief, but it just doesn't seem like you're going to
do anything with it. As I said, it looks like he's only a "dragon/human hybrid" to be cool and be able to fly and breathe fire, and that really doesn't bode well for the Stu-meter.
2) Lydia. Will be main character if Erindor is not. A 'wizardess' as she likes to say, as she thinks saying with is sexist. Has a pet familiar, Talot, a raven with speech and intelligence. Lydia has a staff, which channels her magical energy. She will have total control over an element, need suggestions.
...she thinks saying 'witch' is
sexist? This is medieval times we're talking about. The concept of sexism is not going to exist for the next several hundred years. Yes, this is a fantasy world, but come on - in order for the concept of sexism to exist in any world, it needs to fulfill these conditions:
1) Women must have been considered the weaker sex in less enlightened times (so you can't just say "Women have always been treated as more equal to men in my world!", which would be a standard fantasy author's excuse).
2) After this, times must have become more enlightened (but since this is medieval times we're talking about, I'm not sure what revolution of enlightenment resulting in new respect for women can have already happened).
3) In these more enlightened times, there needs to be a women's liberation movement calling attention to the prior oppression of women to have come up with the idea of sexism and made it condemnable (in medieval times - come on, this is just getting ridiculous). Actually, they'd need to have spread their message in a way that's
impossible with medieval technology - no newspapers (heck, most people can't even read), no media in general, no Internet... just
how could anybody possibly raise public awareness about anything in medieval times?
Is this
really worth it? If you want to call her a 'wizardess', just pretend that's what people have always called female magic users in this world, or that 'witch' is defined as meaning only a woman who uses black magic, or what have you. Don't try to squeeze a concept like sexism into a world where it clearly doesn't belong.
As for which element she should control, I'm puzzled as to why you feel the need to ask for suggestions on that of all things - there are only four elements after all (assuming you're thinking of the Ancient Greek elements, rather than the Ancient Chinese elements or the chemical elements), and figuring out which one would suit her best shouldn't be that hard. Or, at the very least, you should be better able to pick one than we are, since the only thing we know of her personality is that apparently she's a feminist wildly ahead of her time. What, you just want us to pick the element we personally like best? Why would that be what is best for her as a character?
3) Aether. An elven archer, amazing shot, a bit over ambitious. Will later betray the group and become evil, second-hand man of the main bad dude. Long bow/Knife combo.
'A bit overambitious' is going to make people predict the face heel turn, you know. :/ Especially with the conspicuous lack of any such statement of something unlikable about the other main characters, which seems to imply that either there is nothing unlikable about them or that their flaws are considerably less pronounced. Overambitious characters are
always bad guys.
6) Kulttripse. The leader of the Oxiriths*. Very powerful, has a thirst for blood. A cold hearted killer, probably will be killed by the end of the first book so Aether can take over.
*Oxiriths are evil, nondescript cloaked figures. Have sharp claws and are good at killing.
That name sounds really... odd. o.O
Now, we don't know the Oxiriths' significance to the plot, but I'm getting this real feeling they're going to be something like orcs: an evil race of not-quite-human creatures in the service of the bad guy. In which case... that's quite old. :/ Can there really not be people with honest intentions in the service of the bad guy?
7) Dark Lord. The ruler of the realm, evil, and ultimately the last bad guy they take out, in last book. Haven’t really come up with anything for him.
...and Dark Lords are also quite old.
See... pure evil is kind of lame. You've got a dark lord, a character already predestined to be "evil" and be "taken out" at the end, and
now you're trying to come up with more background? No, no, no. You're doing this the wrong way around. You're deciding, "I need a main antagonist, so here's a placeholder pure evil dark lord, and now let's get somebody else to come up with some half-hearted backstory about him."
No. Take a deep breath. Think about it yourself, honestly. What has this character done that makes him so supposedly evil - why do the protagonists feel that he needs to be overthrown? What were his motives in doing that? Where did those motives come from? And don't just half-ass this with "He oppresses his people because he's a sociopath" or "He executes innocent because he likes killing people" or "He usurped the throne because he was power-hungry." That's
boring. Give your villain some depth, and don't ask us to do it for you, because
you should care.
Us giving you plot twists is equally ridiculous. The fun of writing a story is to think of things like that yourself.
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Now. Overall, looking over this, your character roster
really looks like a list of the playable characters in a very generic fantasy RPG video game. Male melee swordfighter with special physical powers, female magic user, elven archer, cute fuzzy mascot with a unique, useful ability, shady guy who can transform into an animal. This might be weird to say, but your characters' races and combat styles are too carefully varied for it to be believable. In a video game, the creators want to have a varied character roster so that they can appeal to a wide variety of tastes and let people use the characters they like best; in a story, I can only wonder
why these people are out together trying to defeat the dark lord. How in the world did they all meet and become friends? Why do they all have the same goals? Why don't elves look down on humans, or humans on werewolves, or anybody on a
dragon/human hybrid? This just doesn't seem very well thought out. :/
Really, in general this seems kind of painfully generic, characters aside. I've already told you why the dark lord and the creatures in his service are old and boring; I've seen all of your main characters before a million times, and the little we know of the plot seems like the plot of every high fantasy ever.