While progressing through the game, Naija learns 7 (8 if you count the dual form as two, 9(10) if you count the "normal" form as an additional one) different forms she can access via singing.
Energy Form
The first form you will obtain. It can shoot spikes of energy (look like flames) whenever you click the right mouse button or press control. You can charge up your shot by holding the attack button for a moment, then releasing it. There are 3 forms of a charged up shot:
- Just press and hold attack button, then fire. It will shoot 3 spikes.
- Press and hold the attack button, dash forward and hit the dash button again (space) to do a roll, then release attack button while rolling. It will shoot 4 spikes.
- Press and hold the attack button, dash towards a wall to get hold of it, then dash from the wall, press the dash button again (space) and release the attack button while rolling. It will shoot 6 spikes.
There are energy balls (big white pearls) you need to shoot with either the energy or the dual form (Li) to activate a door.
- Hotkey: 2
- Song: File:Aquaria Sprout.gif File:Aquaria bowl.gif File:Aquaria star.gif
Beast Form
The beast form doesn't have a regular ranged attack, but attacks with Naija's jaws and teeth. When dashing towards an enemy, Naija will bite it and try to devour it (given it has a certain size). This dash leaves a pink trail that looks like a fish with a fin and a mouth. Whenever you devour fish or certain jellyfish, Naija will regain health (fish award very small amounts of health due to their school size, whereas jellyfish grand greater amounts of health). Devouring enemies, though, won't award health. Additionally, whenever you devour certain enemies (most of all those which can shoot), Naija will get a limited amount of "ammo" of the projectile the devoured enemy usually fires. Pressing the attack button now will fire the latter. The beast form's limbs are strong enough to propel Naija through every current there is in the game that you couldn't pass before.
- Hotkey: 3
- Song: File:Aquaria drop.gif File:Aquaria star.gif File:Aquaria bowl.gif
Nature Form
The nature form has very a limited capability of offensive strategies. The attack button will cause Naija to throw a small seed, which will sprout into a pair of flowers when hitting a wall or a floor. They do not do any damage to foes. The charged attack, however, will cause Naija to throw a larger seed, which will sprout into a giant cactus-like plant with thorns, blocking the path and damaging foes on physical contact. This plant can also damage anemones. Beware those thorns, though. While they won't hurt Naija in her nature form, touching them in any other form will cause damage to her. Naija will also gain immunity to any other thorns found in The Kelp Forest. This form's attack is also used to open hidden portals, looking like big blue sea urchins.
- Hotkey: 4
- Song: File:Aquaria star.gif File:Aquaria seed.gif File:Aquaria circle.gif
Sun Form
The sun form doesn't have any attacks and is also quite defenseless. Its sole purpose is to light the dark areas of certain "dungeons" and maps and to progress through The Abyss. Pressing the attack button won't do anything, but charging the sun form's "attack" will cause sun rays to burst away from Naija's position and lighten her environment for a short period of time. While in sun form you are able to use the minimap and the map again in dark areas.
- Hotkey: 5
- Song: File:Aquaria seed.gif File:Aquaria drop.gif File:Aquaria seed.gif File:Aquaria drop.gif
Fish Form
The fish form also is attack- and defenseless. When pressing the attack button, you will "shoot" bubbles in the direction your mouse is pointing, but they won't cause any damage. There is no charged shot in this form. The fish form enables you to travel faster and to slip through tight passages you normally wouldn't be able to pass. It will also allow you to swim past certain enemies unnoticed (it's unclear which enemies exactly). You can trap some creatures in the bubbles you shoot and then bind them and carry them with you. A useful place is the Abyss where you can catch the glowing jellyfishes. This way you have an extra light if you can't (or don't want to) use the Sun form. If you eat a Swamp Cake you make poisonous clouds in Fish form.
- Hotkey: 6
- Song: File:Aquaria seed.gif File:Aquaria drop.gif File:Aquaria star.gif File:Aquaria circle.gif
Spirit Form
The spirit form's sole purpose is to get you past obstacles you normally couldn't pass. While in the spirit form, the time will stop running and you can move away from your body (don't be surprised the first time you enter this form, your game didn't crash). When pressing the attack button, Naija's spirit will try to reincorporate with her body at the spirit's position (like teleporting your body to where your spirit is). This will only work at certain crystals, though, which have a blue color and emit a blue glow. The spirit form will cancel when moving too far from Naija's body.
- Hotkey: 7
- Song: File:Aquaria drop.gif File:Aquaria circle.gif File:Aquaria swirl.gif
Dual Form
The dual form lets you merge with Li to form one being. You will have two sides now, which you can switch by rolling (either hold your left mouse button and quickly draw circles around Naija/Li or just press R on your keyboard.
Li
In this form you are able to shoot a strong beam of several blue energy spikes, but this will only work when your attack is charged. In short: The dual form doesn't have a normal attack. Whenever you kill an enemy in the Li form, you will absorb it's energy (literally) and raise your invisible counter by 1. After killing 3 enemies, your counter is full and you will hear a small screaming sound. Killing more enemies will visually absorb their energy, but doesn't raise your counter above 3. You won't lose your counter when changing forms or leaving a map.
Naija
This form has no standard attack and won't be able to attack without the help of the Li form. When your counter reached 3 by killing enemies in the Li form, you are able to charge the attack of the Naija form. Releasing the attack will unleash a devastating scream, which will instantly kill every smaller enemy in range. It won't affect greater enemies (like the Green Sea Dragon in The Kelp Forest), though. You should switch to the Li form, after screaming, since the Naija form is pretty helpless without being charged by Li.
