A listing of impressions I have on the characters of Melty Blood.

Tohno Shiki
Tohno Shiki's a bit slow ( All right , his awkwardly slow compared to Nanaya ) but he can dish out some pretty decent aerial combos and he have some pretty decent ground attacks which leads to such combos in question.
It's like using a watered down version of Nanaya or something.
Still - despite how it sounds once your used to using him , his a pretty powerful character by his own right.

Nanaya Shiki
My favourite character =w=
Fast , mobile and his Uppercut Kick can counter most attacks if used well.
Not to mention he have some pretty versatile attacks in his arsenal.
Though on the downside , his Teleport attacks leaves him fairly vulnerable prior to their execution and some of his attacks leaves him as open as a sitting duck to assaults.

Arcueid Brunestud
Powerful , fast and have some pretty decent combos.
On the downside , she lacks a bit of range in comparison to some of the characters.
Whilst she may be a walking melee horror , the lack of range would definitely make Ciel happy.

Red Arcueid
In comparison to Arcueid , Red Arcueid have a greater range potential but her Specials' damage can be easily reduced and she isn't quite as technical compared to Arcueid.
If one have to put it bluntly , she may be a pit of power - she leaves herself open during her attacks which - usually - can be dodged by jumping.
Still , an Unlimited Red Arcueid can get really annoying.

Ciel
Curry Girl!
Ciel is a pretty technical character to use considering the move sets that she utilises.
It'll take a while to master her but her great potential in both melee and ranged combat makes her one of the opponents you wouldn't really like to face.

Tohno Akiha
Akiha is a bit tricky to use and connecting lengthy combos with her takes quite a fair bit of skill.
On the upside , she can drain the Magic Circuit of her enemies - turning her into an annoying enemy to face in lengthy battles.

Vermillion Akiha
A more powerful form of Akiha with greater range and offence value.
Though both of them pretty much lives by the same rules - both of them takes skill to master.
Still , I don't use Akiha if I could help it so I can't really tell much of the perks that Akiha have.

Hisui
Whilst she is a surprisingly decent ( and unique ) character to use - her Last Arc is a bit of a waste considering that it only confuses the enemy and renders them immobile for a while.
Whilst most Last Arcs are killer moves - she renders her opponents defenceless solely for a moment... ugh.

Kohaku
A suprisingly lethal character =.=
Owing to how alien her moves are compared to the other characters it may prove distracting to human players and that fire bomb attack of her's is ever so annoying.

Nero Chaos
The man with six hundred and sixty six beasts in his body have some pretty... beastly attacks.
Whilst their not certainly effective if your talking about how fast their executed but Nero Chaos can prove dangerous to characters with only melee attacks as he can easily push such characters away with his brutal moves and even ranged characters may be annoyed by the crows and beasts that Chaos releases.

Len and White Len
Might as well describe these two at once.
Whilst they don't dish out the best damage ( Per Hit ) they can prove disorienting to human players owing to the dopplegangers that they spawn.
Still , it's not really going to work well on characters with lethal range.

Kishima Kouma
His a beast... A BEAST I SAY!
Whilst he certainly does lack ranged attacks , his melee prowess is one of the best.
Incredible damage , decent speed and burning fists - need I say more?
Piece of advise - Handicap Strong Kouma ( and Handicap Weak for yourself ) isn't recommended for newbies. One punch will send a quater of your Health into the Akasha.

Roa
I don't really like using Roa but his actually quite capable in combat if you know how to use him.
Like Akiha , he can plant "traps" on the ground which can be really useful for combos but on the downside , you'd require a fair bit of skill to pull a lengthy combo off.
Still , Roa's unusually well suited for combat despite his performance in the Visual Novel.

Ryougi Shiki
Like the other Shiki , her damage is a bit on the low side but her attacks are incredibly fast and her full combo can chunk off quite a lot of HP off the enemy.
Whilst she can't move quite as fast as Shiki , oddly enough , her attacks are faster in comparison and she's highly suitable for combos and colossal damage ( and butt kicking )
Not to mention she have a pretty awesome Last Arc.

Sion Eltnam Atlasia
Sion is a highly versatile unit and once you've managed to memorise her moves - a variety of combos will open up to you.
Convenitently her Etherlite and her Black Barrel Replica gives her some pretty decent range and she's fairly capable melee-wise as well.
Though her melee attacks have a fair bit of lag time here and there..... so... *cough*

Sion Tatari
Sion Tatari can create duplicates of other characters like Wallachia , but the lagtime for the attack of the characters is longer so the enemy have enough time to escape.
But whilst they escape , Sion can simply jump in and pluck at the enemy like a piece of fresh meat.
Though honestly put , her range potential isn't quite like that of her previous form.

Ugh... I think I'll complete the listing next time... feeling a bit... sick.