“Fleet foot + resolve + doran's shield start should be enough to let you survive the early stages against her aggressive laning phase.
Her Q deals less damage when passing through targets so stay behind minions when trading. You can start trading back once you have level 3 but until that play it as passive as possible and make sure you don't get poked too much.
“Her spammable shields and long range poke makes it very difficult to outrade. There is a chance you will be able to all in but that is prior on how the laning phase went and if you aren't behind in gold/cs pre level 6. If she goes seekers/tabis rush likely won't be able to do anything to her.”
“Keep your eyes on the ball, she relies on people not paying attention to it to deal damage way more than you think. While still dangerous in the late-game, she's generally not nearly as powerful without her ulti, so try to make your move if she misses it or wastes it.”
“She will poke you a lot since you are a short ranged champion and she has a lot of range. Her damage is also insane and she scales quite well. You can't ever get close to her if she plays properly so just try to farm and outroam her after level 6, since your waveclear is slightly better than hers.”
“She wins trades hard if she's playing with Phase Rush, and also outscales you. Don't waste your spellshield on her poke when she has ult up. She is very immobile and easy to collapse on, so call your jungler for help.”
“In my opinion the Orianna lane is less favored for you. She out ranges you pre 6 and can easily poke you out of lane if she has a good lock on your movement. Try to mix up a lot of your movement options and throw q's in when possible. Try not to get pushed under tower because that's when she is most effective against you. Look for kills after 6 were you can answer back with your own mobility. ”
“Poke from afar; be careful of early skirmishes as shes stronger early
“Can spell real trouble with you if you aren't careful enough. Orianna has ridiculous poke early game and she out ranges you too by far. farm play passive and all in her like most at 6 if you can and are confident.”
“Space out turrets so she can't AoE them. Poke from afar with Luden/Missile procs.”
“Orianna's kit makes her a very safe laner with the ability to zone her opponent efficiently. Most Orianna players take Barrier as well to make it even harder to kill her. Make sure you harass her once she used her Q-W combo.”