| Spoiler warning!|
This article contains plot details from the latest books.
“Everyone believes I'm the fragile beauty hiding in my husband's shadow. But I'm far more powerful than anyone imagines.”
—Della, in Book 4: Neverseen
The name 'Della' means "Bright" and “Smart”.
Della has cobalt blue eyes and heart-shaped lips. She also has long, chocolate brown hair. She is noted by Sophie to be very beautiful, to an unreal extent. Della also looks a lot like her daughter Biana. She, according to Sophie, is always looking flawless.
In Neverseen, Della proves herself to be much more than a fashion-loving mother. She stows away with Sophie and her friends when they go to join the Black Swan by remaining vanished. She is only discovered when Biana (who was the only person Della told about her plan) asks for another device that helps with breathing underwater, which makes everybody suspicious, because she only needed one herself. Mr. Forkle read Biana's mind and learned about Della. However, Della still insisted in joining the Black Swan, and convinced Mr. Forkle that she would be very helpful, by easily knocking him down in heels and proving that she could walk through water without creating ripples and or getting wet. Della is a very powerful Vanisher and can move very fast. She is very tough and not afraid to fight for what is right.
Della also mentions in Neverseen that she once walked among humans, and her reception was less than friendly.
In Nightfall, Della joins Edaline Ruewen and Juline Dizznee to make a team, protecting Wylie as he "makes a deal with the Neverseen." She proves that she is powerful by tricking Ro, and is able to hold a knife to her throat by vanishing and "attacking".
Della is married to Alden. Their relationship is steady and they have stayed together even after, many people( Dame Alina) have tried to break them up. She cares for him deeply. In Exile, she is extremely upset when Alden's mind breaks but tries to stay strong for her children. She was obsessed over trying to bring him back by doing things that he likes.
- FITZ (son)
- BIANA (daughter)
Like her mother and oldest brother, Biana is a vanisher. Biana is said to look a lot like her mother. Both mother and daughter share a love of fashion.
- ALVAR (son)
Alvar is the oldest child of Della and like his mother and younger sister, is a vanisher. When Alvar comes for dinner Della immediately sets a place for him. Della also cried for weeks when Alvar was discovered to be a Neverseen member. Aside from this, Avlar is her only child that has her cobalt eyes, instead of Alden's teal.
- KEEFE (like son)
Keefe goes to Everglen a lot and is like a son to Della.
- SOPHIE (like daughter)
Della cares for Sophie like a daughter and together with Alden, they decided to see if they could adopt her in book one. She was one of Sophie's only supporters earlier in the series.
- EDALINE (very good friend)
Edaline and Della help each other stay strong numerous times, especially through sad events that take place throughout their lives.
- Della joins the Black Swan in book four.
- Della is a very powerful Vanisher.
- People think of her as just a fragile beauty, when really she isn't
- She tried to bring Alden back when he was broken in book two.
- She has studied music with dwarves.
- Della is one of Sophie's favorite people.
- Only one in the Vacker family that isn't hurt by Neverseen at some point in the series.