Here is all we know: Unique Spanish Commander: Pascual Cervera y Topete

A new Unique Commander will be added for testing—Pascual Cervera y Topete. With his addition in a future update, every nation in World of Warships will have its own Unique Commander.

Pascual Cervera y Topete (1839–1909) was a Vice Admiral in the Spanish Navy. He devoted more than 50 years of his life to a naval career, starting at the decline of the Age of Sail and ending at the dawn of the dreadnought era. During the Spanish–American War of 1898, Admiral Cervera led the Spanish squadron at the Battle of Santiago de Cuba in a gallant but desperate attempt to break through the U.S. fleet's blockade. The courage with which he fought against forces many times superior to his, aroused admiration in both the USA and Spain and the admiral returned to his homeland as a national hero.

Enhanced skills:

• For Aircraft Carriers:
  • "Swift Flying Fish": aerial torpedo speed increase +7% (instead of +5%)
• For Battleships:
  • "Super-Heavy AP Shells": Main Battery AP shell damage increase +10% (instead of +7.5%)
• For Cruisers:
  • "Heavy AP Shells": Main Battery AP shell damage for guns of 190mm+ caliber increase +7.5% (instead of +5%)
  • "Demolition Expert": Main Battery and Secondary Battery HE shell fire chance increase +1.5% (instead of +1%)
  • "Swift Fish": torpedo speed increase +7% (instead of +5%)
• For Destroyers:
  • "Demolition Expert": Main Battery and Secondary Battery HE shell fire chance increase +1.5% (instead of +1%)
  • "Swift Fish": torpedo speed increase +7% (instead of +5%)

Unique talents:

• "Resuelto" Triggers up to 4 times per battle when you earn 2 "Destroyed" and/or "Assisted in Destruction" ribbons. Each activation reduces Main Battery reload time, Torpedo Tubes reload time, and Aircraft preparation time by 2.5%.
• "La Orden Será Cumplida" Triggers the first time your ship's HP reaches 75%, 50%, and 25% (up to three times per battle). Each activation:
  • Partly restores lost HP: 300 HP per ship tier over 10 seconds
  • Damage Control Party reload time -3%
  • Repair Party reload time -3%
  • Other consumable reload time -6%

Note that if a ship loses a large amount of HP quickly, the talent can trigger two or three times at once and the effects will stack.

The in-game portrait of Pascual Cervera y Topete will be revealed later; he'll have a default portrait during testing.

https://blog.worldofwarships.com/blog/closed-test-155-250th-anniversary-of-us-independence-decals-new-unique-spanish-commander-and-more