All I know is what is described in the rulebook:
Ezren, the Wizard
Ezren’s talents lie in spellcasting. He’s got a lot of spells, and can get them into his hand quickly. This also means he might run out of cards before he reaches the end of the adventure. He also has no blessings, so he might not get to explore much unless he acquires some allies or finds some magic that lets him explore again.
Harsk, the Ranger
Harsk is the friend everyone wants to have-as long as he’s somewhere else. Ranged weapons suit him best; his ability to fire arrows from long distances can turn the tide of many a combat. He’s also great in dangerous locations because he can scout out the threats in advance and endure whatever they throw at him.
Kyra, the Cleric
Everybody runs to Kyra for help. She can heal without a Healing spell, but doing so keeps her from exploring. She must find a balance between using her blessings for bonus dice and spending them to explore again. She’s also a good combatant, and shines when she tries to kill something that should already be dead.
Lem, the Bard
While most others specialize, Lem wants to do everything. He’s a jack of all trades, capable of handling most challenges. He’s great at making friends, whether they’re characters who need a boost or allies who want to join his side. He should pick up as many spells as he can, as he’s the only character who can use all of them.
Merisiel, the Rogue
When she’s on her own, sneaky Merisiel has the power to burn cards to boost her own deadliness. She can take out just about anything-including herself if she’s not careful. She needs to temper her bonus damage with self-preservation instincts. She’s talented at removing barriers, and at never getting into a fight she doesn’t want.
Seoni, the Sorcerer
Seoni blows stuff up. Even if she doesn’t have a spell in her hand, she can invoke a fire blast whenever she meets an unfriendly sort. She doesn’t have many spells to start with, but since she has an explosive power, her spells don’t have to be Attack spells. And since she always recharges her spells, she’ll be seeing them a lot.
Valeros, the Fighter
Valeros is bristling with weapons. While most characters must discard them for their most powerful effects, Valeros just puts them back into his deck. That means he shouldn’t be afraid to take damage or discard to get to the cards he wants. Valeros is effective when he’s using up his cards, not when he’s safeguarding them.
Amiri, the Barbarian
Amiri is a scrapper. The strongest character in the game, she can also unleash her deadly rage, tossing cards to get boosts to her physical checks. This is a bit dangerous, but Amiri is a daredevil. She’s never going to be stuck anywhere she doesn’t want to be. When a barbarian enters the room, she leaves when she wants to.
Lini, the Druid
Lini commands animals to do her bidding-a humble dog will serve her better than most humans will. She’s a good spellcaster, and can serve as a healer if Kyra’s occupied. If all else fails, she can even turn into a bear to bump up her Strength or Dexterity considerably. That lets her collect a lot of non-Attack spells.
Sajan, the Monk
Sajan has nary a weapon, armor, or spell, but that doesn’t mean he’s a lesser combatant. He churns through blessings to pump up his unarmed attacks, and to explore as much as he likes. Sajan’s lack of armor means he can quickly get into trouble, though, so he wants feats and items that can soften the sting of bad luck.
Seelah, the Paladin
Seelah can wield swords and spells with equal skillfulness, and excels when on the defense. She turns blessings into damage, and her armors can handle most assaults. Seelah can also scope out the locations she’s exploring, but don’t expect her to hang on to treasure-she’s looking for evildoers to smite.