More thoughts on Bluelikes, since SMT came up. The leads from SMT1 and 2 have unique commands which allow them to summon demons that other human PCs don't get. They can both carry up to 12 demons and can have 5 summoned at a time. If they start a battle alone, it takes up a turn each time they summon a demon. Since these are unique commands, it seems entirely legal to allow it to them. They're also decently powerful PCs without the summoning (though their tricks are much more limited).
Along the same lines, Revya from Soul Nomad has unique summoning abilities, and if you allow this, she'd be a Bluelike like Marona. Revya can summon up to 8 squads of generic demons without taking up a turn. Marona can summon up to 14 phantoms, though these are limited by their turn limits.
Similarly, Zetta as the Sacred Tome from Makai Kingdom only has 1 ability - the ability to summon generic demon units, as well as vehicles and buildings. However, unlike generic units, buildings and vehicles are created by PCs, so they may not count as unique to Zetta, even though he's the one that actually summons them to battle. Zetta as the Sacred Tome is level 2000 and has a lot of durability, but if he takes even one attack, he's no longer able to summon units. Also, anytime he is hit, all of his currently-summoned units take the same amount of damage dealt. He always gets initiative, and he can summon his full army in his first turn, though if the enemy attacks him with any significant damage (or status effects), his whole army feels it, too. An interesting blitz technique to say the least, and a cool Bluelike idea.
And a cool one that was featured in the last Twink Tourney... Red from Pokemon GSC. Since Red has no attackable form himself, and relies solely on his pokemon for health/damage, he's a required Aeon Parade that can't be 'outsped' like Yuna, (but his team is much less dangerous than Yuna's Aeon Parade).
-Djinn, still on a mission to collect a list of interesting Bluelikes.