Playing ksenia is all about communication! If you don't communicate with your teammates you will lose, make sure you have the button "3" on hand so you can remind your allies to defend while you go off and do your own thing, when they request for help go invisible and kill the naut who your allies risked their lives trying to kill.
(Figure 1.0 shows ksenia ready to communicate with her fellow nauts)

Build around this! Have fun! This is all you need to run around the map without dying.

Froggy Afro doing his thing

Because of Froggy Afro you can push really well with ksenia, just wait for the enemy team to push your other turret then sneak down and destroy the turret with Froggy Afro, with or without the droids, If you have 2 droids you can destroy half the turret, now that is excellent as long as your allies havn't been dieing and your base is still in one piece!

If the enemy team does mistakenly try and gank you then no problem! Just roll away with invincibillity and you'll be fine and they will be wondering where half their turret went :3
This will also give time for your allies to push which comes back to communication, press "4" repeateedly when you see them try to gank you on the minimap.

On the rather odd occasion just 1 of them comes along then just AA them to death before they can say "Zork laggy Ksenia" and if you're lucky they will rage quit.

When both of your teamates die at the same time you are screwed, make sure to shout at them for doing this and tell them it was their fault they couldn't do 1 little thing which was defend 3v2 while you pushed. If you're getting bored while the turrets are destroyed feel free to give someone a haircut and dance with the creeps.

You've probably lost at this point so make sure you run around taunting the enemies for the rest of the game.

If you really want to win at this point, try and lure the enemy nauts to come after you instead of the turret by running around with squishy HP.

Ksenia is what is known in Awesomnauts lingo as an Assassin, this means she is good at having a target and killing them quickly, there is only one catch.. the target has to be either by themselves, or have really low health. If they have low health just throw some scizzors at them and they will die, real simple!

Strategy with ksenia relies on using your invisibillity to do unsuspecting things, run the opposite way anyone thinks. Come out of invisiblity just out of enemies reach so they rage at you (not advisable against clunks).
You're the fastest character in the game so don't waste your invisibility if you can just run away.
Be careful for snary things and stuns as you will die if you get hit by one.
Remember unpredictabillity is your friend!

Watch and learn!

If you can't be bothered reading all this I'll sum it up by saying that every naut can almost insta-kill you so be careful. Use your roll, stay vigilant and win.
I have rated their difficulties of playing against.
DISCLAIMER: These mini-guides are based on 1v1 when you are both on full health.

Froggy G (medium)
You're pretty on par with froggy G as long as you're not stunned.
If you have Invisible Girl try to anticipate his dashes and roll at the same time, you will be invisible and froggy would have used up an ability... WIN WIN
Try and avoid tornado. He's hard to hit but fun to dance with.

Lonestar (medium)
You can roll through his bull with Invisible Girl, you'll think he's squishy and you'll chase after him but that's not a good idea because grenades will kill you and Lone will regain his health so make sure you silence him before you attack.

Leon (medium)
Leon is like a better version then you, look out for his instakills when you are less then 3/4's health.
Tounge tends to get you even if you roll with max range so try not to engage too much, Leon is squishy though and you can kill him if he is invisible on low health by throwing scizzors constantly on the ground/walls.

Scoop (medium)
Scoops hammer is a bit of a problem for you as it garuantees death on hit 2v1+ so try and avoid it, Scoop has the annoying abiliity of regaining health all the time so it's often hard to kill him, just keep hitting him.

Gnaw (medium)
You need some suistain badly, get Braided Tentacles (lifesteal on hit). That will help against dying, make sure you stay away from the little weedlings, they kill quite fast.
Let your team deal with them.

Raylean (easy)
Very easy to deal with, you can roll through her snipe and kill her just don't try rolling though timerift, it doesn't end well.
If the Raylean is smart enough to use AA, get knockback and let her speak to the scizzors.

Ayla (hard)
Ayla is your worst nightmare! if you combat her it is wise to get knockback on your knives and slow on your roll, otherwise she will follow you with rage and you will die, never chase Ayla as she will evil eye you for a surprise killsteal (that's right she steals your kill right back atcha)

Clunk (easy)
Time your rolls right, you don't want to get hit by explode, I repeat you don't want to get hit by explode!!! After he has used explode go in for the kill, clunk is easy pickings! >:) Don't let him bite you! :clunk:

Voltar (hard)
You will see voltar on 1/4 health and think he is easy pickings.. DO NOT LET THAT FOOL YOU.
Voltar will shred you to death before you can say "How the Zork?"
Even when voltar is low on health, keep your roll ready sudden gettaway!

Coco (impossible)
Another worst nightmare, you cannot actually melee coco, it is physically impossible, literally, you cannot actually kill her with AA, try and stay on the opposite side of the map to her, get knockback on your knifes to stop her from harrasing you. RInse and repeat.

Skolldir (easy)
Dance around his face and keep hitting him until he dies, If you think he might beat you 1v1, think again and kill him. You will win.

Yuri (easy)
Depends on the rest of the team, but a lonely Yuri is a dead Yuri, simply roll through his mines and wack him with your scissoring AA as he tries to get behind the turret, just keep going you'll be able to kill him just as he gets to safety.

Derpl (medium)
Now I would say that Derpl is easy but since the last patch (2.12) he can kinda sit in a lane with his team around him and you'll have to leave him alone, if he's by himself I don't reccomend it either as even if you think you can duke his snare traps, you can't and you will die unless you time roll exactly when nuke explodes.
Before 2.12 ksenia had no trouble with him.

Vinnie & Spike (easy)
Becasuse of Vinnie & Spikes lack of mobillity he makes for a great haircut.
Nough' said.

Genji (hard)
Genji can cacoon you, this is worse then snare because sometimes the cacoon doesn't kick in until after you have rolled... leaving you dead and defenseless!
He also has an annoying storm cloud that kills you and he runs away with blessing so you can't really hurt him.

Swiggins (medium)
Swiggins is annoying.

Rocco (hard)
Rocco will out DPS you any day and he can slow you and shoot arrows at you. Don't approach.

Ksenia (easy or hard)
If the other ksenia hasn't read this guide then she will be easy to kill.. but if she has then you're in for a tough fight!

Ted (easy)
Roll through his airstrikes and rip him apart like a barber. He is defenseless against you!!!!

Penny (medium)
Penny is great at getting away and you have no CC so just let her pounce around the map, she is not much of a bother if you see her coming.

Sentry (medium)
Sentry SHOULD be easy to kill but he has a tough sheild so don't rush at him as you'll just be hutring your teamates should he charge up from you.

Skree (hard)
Skree can hit you when you're invisible, this is not fair... You cannot escape with a skree as his lightning goes through the whole maps when there is lag. For some reason you can't roll through his wall so Skree really gets to bake his cake and eat it too.
Sawblade will kill you, do not approach.

Nibbs (medium)
Nibbs and you are rather alike, except Nibbs can kill you faster so do not approach when fire breath is in standby.

Jimmy (medium)
Always silence jimmy, then you can attack him. If he has lifesteal, do not melee with him as he will decimate you even with zero health. The best thing to do is to jump around him like a pinata (y)

Yoolip (hard)
Yoolip is a tough cookie, if you walk past him and he looks at you... then your toast!
Best bet is to wait for him to look at one of your squishy teammates and slice him into the past.

Chucho (easy)
Chucho is easy, make sure you have invisible girl and wait for a grenade to land on you, then pretend to run away to your death but instead, roll during the explosion of the grenade! You will survive if you're good.

Deadlift (medium)
Like all cows, deadlift can jump over the moon. Don't let him get away. Use slowing on scizzors and jump around a lot.

Max Payne (easy)
Max Payne is not very good at damaging you, you have superior mobility, get behind him and slash him to death.

IX the Interloper (medium)
IX makes a better teammate than enemy, his multiple chances to be invincible really click with invisible girl. Because you are both invincible most of the time nothing much happens. You need to use the one thing you have over IX... invisibility.