I'm trying to start with Manaka, but it feels difficult to control the game since my books don't do much chip, her forward dash feels as if it has a lot of recovery, and books have a lot of recovery. It probably doesn't help that I'm playing against Chizuru lol. What are some beginning tips for her?
I play an extremely lame Manaka as my sub, so I can go over how I play her. Mind you, there are other ways to approach this character, and those are probably more robust as well.
Preferred Assist: Satsuki (the one with the gun)
Ok, when I play Manaka the two main priorities I have are screen distance and meter. Achieve these two goals and the damage will naturally follow. Manaka has great normals, particularly 2BB, but they are all fairly short so with her slow walk speed you really can't play footsies too much. B+C is great to push them back if they're hitting buttons, but even better at this is 2x qcb A+B which is air unblockable and will shove them to the opposite side of the stage on hit or block. This move, however, requires meter to do. To get this meter you need to throw books.
One book throw doesn't do a ton of damage, but multiple hits quickly add up. You also build meter just by throwing them whether they hit or not. At the start of the match, you want to retreat and get into at least qcf B range if not qcf C. Depending on whether they charge in or not you'll have to be creative with pushing them back out to that range. Once you're there, hit 6D to have Satsuki start shooting multiple shots to keep them in place while you thow books to control space and build meter. If they're hesitant, do a qcf C. If they want to come forward, have a qcf B waiting for them. If they are threatening, qcf A will keep them from starting their offense. Also keep in mind that you can jump book throw for different ranges and targets while also being evasive. Above all else, even when hit with another attack a bundle of books will break into scattered books and all of them can still hit the opponent.
Get good at tossing projectiles while mixing in Satsuki's rain of bullets, and you'll have either chipped down a ton of damage or have built enough meter to handle what happens when book tossing breaks down. Namely, 2x qcb A+B, which is invincible on startup and will beat most anything they do, followed by 6D to lock them down on wakeup while you throw MORE BOOKS and recover the meter you just burned.
Eventually you'll come up against people who will know how to bait out 2x qcb A+B, as you CAN jump over it or behind it with proper timing, but either pick your spot more wisely or defend yourself with normal attacks and then combo into it.
Now, she does have other normal and special moves to keep in mind. She can double jump, her jump A is great, her jump B is great, and you can do stuff like knocking people into the air with 5C then elbow them with B+C. She has a bookshelf drop attack that's good as well as a counter version. If you do the C version of the counter next to a cornered opponent you an walk offscreen and reappear on the opposite side. You can also adjust the range of her 2x qcf A+B super by holding A+B. When you are on your second bar of health and have three bars, her F, HCF B+C will effectively counter a close attack for over a full bar of damage. All of these will help round out your game as you won't always be able to throw books and shoot bullets with impunity.
As for playing against Chizuru specifically, be extremely cautious and favor the shorter or jump book throws as she will want to dash in. She can also punish any unnecessary action.
If your opponent picks Sasara, consider changing characters. That matchup is horrible for Manaka, but not impossible. You'll have to give up on throwing books because Sasara never has to care.