kurumi has the best design but she's the joke character
game unplayable
Kurumi's currently my main so I guess I should defend her. :V
She may only have one special move and she may seem like a joke character at first, but she's way stronger than one might think at first.
First of all, her normal attacks are VERY fast. Her crouching B and standing C are great pokes that come out quickly enough to stuff many of the opponent's moves.
Second of all, she's the only character in the game who can "dial-a-combo" (other than possibly Eri, but Kurumi still does it better). She can chain normal attacks in ways that are simply impossible for the other characters.
Third, she has an unlisted "special move" (if you can call it that), which is tapping down-down in mid-air. What happens is Kurumi falls to the ground super-fast. Does no damage, and she can't do anything until she lands. But she's invincible during its entire animation. Getting up close to the opponent is easier with this move.
Fourth, she can make use of her assists more often than the other fighters, because the assist meter builds up much faster, except when it builds from Level 4 to Level 5 (max), when it slows to a crawl.
Which brings me to my fifth point. The reason the assist meter takes so long to build from Level 4 to Level 5 is because a maxed assist meter is required for one of the best supers in the game (quarter circle forward + BC). Its effects are dependent on the assist character you've chosen, but it's usually projectile-based and it does a huge amount of hits.
If you read all that, sorry for being so long-winded. I just love Kurumi. <3