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“No! It's too dangerous. The power levels are completely unstable and I can't guarantee it won't corrupt you completely! I don't want to lose you.”
— Ava to Merlok 2.0 in "Kingdom of Heroes"

Lady Ava Prentis is a young genius and specializes in technology and keeps things in order around the Fortrex. She commonly is the one who works with Merlok 2.0 all of the time and sends the Nexo Powers to the Nexo Knights.

After the defeat of Merlok 2.0, Ava coded herself into the system, transforming herself into Ava Valkyrie, allowing herself to battle the Monstrox virus from inside the system.[1]


Back to School

Ava woke up and prepares herself in the control room, though annoyed by Robin for using a loud Nexo Power. During a briefing, she figured out the reason that Jestro was attacking the village was because it was the hometown of the Knight's Academy librarian. She and Robin guide the knights to the school and mentioned that the intake of students have increased drastically due to the need of training more knights.

She contacts the knights that Jestro have already infiltrated the library and scans a Nexo Power for them.

The Fall

During the final stand against the Stone Colossus, Ava starting a transfer of Merlok from the Fortrex to Mechlok. In the battle, she monitored Clay's magic index, exclaiming that it was off the charts and was surprised that the later manages to transfer the Nexo data from the entire system to himself.

Official descriptions


Ava Prentis is a brilliant freshman student at the Knights Academy. She is a technological wonder child and a programming power girl who assists Merlok with getting the NEXO Powers to the knights. She is strong-minded, quick-witted and often ends up in discussions with Merlok about whether magic or technology is the real strong weapon against the monsters.[2]


Ava is an amazing programmer and the chief technician aboard the Fortrex. The whole NEXO Power project is the result of the combined powers of her and Merlok 2.0. Ava is focused and devoted to her work, not letting herself get distracted by things like small talk or hanging out with others. TAFK (Time Away From Keyboard) is the worst thing she knows and she is most comfortable when she is in her chair, telling Merlok 2.0 to focus and figuring out a serious technical problem in the middle of an enemy attack.[3]

Techno Genius

Ava is Robin's classmate at the Knights' Academy, and she is one seriously tech-savvy student. Her ability to stay calm in a crisis and provide quick-thinking solutions gives the knights a huge boost when they are in battle.[4]


Ava is one of the younger character, with short legs and dark lavender pants, as well as a dark lavender suit with white lining and a grey belt. Her sleeves are a light shade of lilac, and she has a white, futuristic strap with a yellow light. Ava's hair is dark brown, reaching down to her chest.



Nexo Knights

Season 1: The Book of Monsters

Season 2: Books of Power

Season 3: Storm Over Knighton

Season 4: The End





  • Her name is a play on the word "apprentice," as she is the Knights' apprentice.


Promotional media

In Nexo Knights

In other media


view · talk · edit Characters
Nexo Knights: Merlok 2.0 · Clay Moorington · Lance Richmond · Aaron Fox · Macy Halbert · Axl · Robin Underwood
Allies: Ava Prentis · Jestro · King Halbert · Queen Halbert · Herb Herbertson · Alice Squires
Squirebots: Aaronbot · Axlbots · Chili Vanilla · Claybots · Cowbots · Éclair · Haute FancyPants · Kingbot · Lotta Fun · Lotta Budget · Macybot · Manuel · Persnickety Marge · Riccardo
Merry Mechs: Robot Hoodlum · Dennis · JohnBot
Knights' Academy: Beak · Brutzle · Captain Clash · Chef Munch · Ethan Zilgo · Fletcher Bowman · Griffiths · Izzy Richmond · Knightmares · Ottofae · Relik · Scapeland · Swordmore Brickland
Tighty Knighties: Jorah Tightwad · Shia LaBlade · Jousting Bieber · Brickney Spears · The Blok
Lava Monsters: Mayor Magmar · Beast Master · Lavaria · Whiparella · Moltor · Flama · Burnzie · Sparkks · Bookkeeper · Infernox · Ash Attackers · Crust Smashers · Flame Throwers
Stone Monsters: Monstrox · Stone Colossus · Ruina Stoneheart · Krakenskull · Garg · Roberto Arnoldi · Three Brothers (Roog · Reex · Rumble) · Harpies (Hilda · Ingrid · Ulrika) · Roguls · Gargoyles · Grimrocs · Stone Stompers · Stone Monster · White stone statue · Bedrock Monster
CyberBiters: Monstrox · Dragov · Ruina Stoneheart · Fred · Pola · Cezar · Berserker · MechaByter · MegaByter · VanByter No. 307 · VanByter No. 407 · CyberByters · InfectoByters
Forest Monsters: Mushlord · Baron Badwood · Dame Flora · Bramblina · Loggerhead · Deadwood & Knot · Elm of the Dark Realm
Sea Monsters: Behemoth of Brine · Marquis de Seaweed · Siren · Sharkerado · Mate Squiddybeard · Savage · Poop · Deck
Order of the Eight: Augustin Halbert · Reginald Brickland · Therence Richmond
Other: Aaron's father · Aaron's mother · Arthur Eaglewing · Axlina · Baron von Bludgeoneous · Cheddarton · Chopper · Coughmeyer · Cuthbert Richmond · Dustin Hoffmeier · Edvard Evanson · Gobbleton Rambley · Goldie Richmond · Hadda Hammerin · Jack Shields · Jebediah Hazard · Jestro cosplayer · Jestro cosplayer's grandmother · Jokes Knightly · Jurgen von Stroheim · Lance cosplayer · Mama Axl · Maynard · Mooper · Morty · Ned Knightly · Papa Axl · Princess · Ramsey · Robin's father · Roger the Scrubber · Roger van Nelsing · Royal Soldiers · Slab Rockowski · Trix Taylor · Woody Carverer