How to get the full Zora Armour - Zelda Tears of the Kingdom
The Zora Armour is a handy set of equipment found in Breath of the Wild and naturally makes its return in Zelda Tears of the Kingdom.
Like most sets in the game, the armour is divided into 3 distinct parts, each with its own properties. The helmet allows you to make twisting attacks in the water. The armour allows you to climbing the waterfalls like a salmon. The leggings complete the set and allow to swim much faster.
Where to find the Zora Armour
Since Breath of the Wild, Link has returned the Zora armour to the royal family of the Zora domain for repair. Indeed, the armor was damaged during the fight against Calamity in the first episode. It is YonaSidon's wife, who is in charge of the repairs. Go and find her at the Zora estate.

Yona is initially in front of the statue of Sidon, at the entrance to the Zora domain. After talking to her, she will go upstairs to heal the Zoras poisoned by the mud. It is by going to speak to her at this time that she will tell you about the armour.
To repair it, she would need the scales of an ancient arowana. If you don't have any yet, they can be found at the top of the Mount of Lightning, near the statue of Mipha. (You can celebrate your reunion with Sidon at the same time, if you haven't already done so).

Bring the scales to Yona and she will give you the armour. It will make it much easier for you to climb back up to the top of the domain.
Where to find the Zora Armour Helmet
Before you can get the other pieces of the Zora armour, you'll need to complete the Water Temple alongside Sidon.

Talk to the Zora on the right of the former King. They will tell you that the helmet is hidden somewhere in the celestial island in the shape of a fish where you already had to go to access the Water Temple.
The helmet is in a chest on a wall of the island, slightly below. (Coordinates 4120; 0515; 0584)

Where to find Zora Legwarmers
Like the helmet, you must complete the Water Temple to get Zora leggings. At that time, the King will retire. Sidon and Yona will officially become King and Queen. Talk to the new Queen and she will tell you that there is something hidden in the Ancient Zora Temple.
This is the place from which you had to remove water in your quest to reach the Water Temple. Now that the water is gone, the place has changed. Jump into the whirlpool to return to the Ancient Zora Temple and follow the path to the large room with the central column. At the foot of the column is now a hole. At the bottom of the hole, behind a waterfall, is a chest containing the Zora leggings.

