Sammy Valdez

"She said Hazel’s great danger would not happen in my lifetime. But I promised I would be there for her. You will have to tell her I’m sorry, Leo. Help her if you can."

- Sammy talking to a baby Leo

Sammy Valdez, Sr. was Leo Valdez's great grandfather and childhood crush of Hazel Levesque. He went to the St. Agnes Academy for Colored Children and Indians during his childhood before moving to Houston, Texas.

History
Sammy Valdez lived in New Orleans during the same time as Hazel Levesque in the 1940's. As a result of Hazel's mother using cursed stones, kids and adults would tease her. Sammy was Hazel's only friend during this time and took care of her. He also took care of the horses owned by rich families and would, occasionally, sneak Hazel into the stables to help him and let her ride the horses. For her birthday, he took her horseback riding and they set up a picnic where he gave her a cupcake. Unfortunately, Sammy would never see Hazel again as Hazel's mother was persuaded to move to Alaska by Gaea.

After she left, Sammy sold a diamond that Hazel had allowed him to keep, despite promising not to. Using the money, he moved to Houston, Texas like he had always dreamed of. Once there, he opened a machine shop and started a family. Before he died, he got to meet his great-grandson, Leo Valdez and gave him his blessing and asking him to help Hazel if he could.

The Son of Neptune
When Hazel made it back to her old home in Alaska, she found an old photo of Sammy, and Percy thought he had seen him somewhere before. Later, Percy falls into a pit of muskeg and Hazel jumps in after him, but Gaea forces an image into her mind of an ideal future, including a future version of herself getting married - possibly to Sammy. Hazel says that these visions aren't real and with Frank's help, they pull Percy from under the ground. When Leo Valdez sends a video message to Camp Jupiter, Hazel mistakes him for Sammy, as the two look almost identical, and Percy remembers how Leo looked a lot like Sammy from the photograph, but tells Hazel that it can't be him, as he would be over 70. According to Gaea, he moved to Texas and married at some point, but later died of a heart attack in the 1960s, having never forgotten about Hazel.

The Mark of Athena
At first, Sammy is only mentioned by a few other characters. Frank asked Leo if his name was Sammy, which only served to confuse Leo. Later, while on an island with Hazel, she said that he reminded her of someone. Leo correctly guessed it was Sammy and Hazel is surprised that he knows the name, even if he doesn't know who Sammy is.

During their trip to Rome, Hazel tries to show Leo who Sammy was by triggering a flashback and pulling him into it. Now seeing Hazel's memories, Leo watched as a large kid named Rufus picked on her, stepping on her lunch, and demanding a diamond for himself. When a diamond involuntarily popped up from the ground, Sammy appeared on the scene holding a dunce cap and using it as a megaphone. He put on a whole show, pretending to be a director while he addressed Rufus and Hazel as movie actors (Gary Cooper and Hedy Lamarr respectively). While the growing crowd of people all laughed at Sammy's antics, Rufus only became confused and angry at everyone laughing at him. During the performance, he picked up the diamond and watched as Rufus was carried away inside by kindergarteners when the bell rang a moment later.

After everything calmed down, Sammy picked up Hazel's lunch bag and presented it to her as if it were a crown. Hazel and Sammy joked around, with Hazel worried that Rufus will kill him, but Sammy simply brushed it off and made Hazel laugh some more. When Hazel warned him that the diamond is cursed if he sells it, Sammy promised not to and would keep it as a token of her flavor, which she corrects him on. As they headed back to English class, Sammy promised to always be there for her. As Leo watched Sammy, he couldn't help feel that he was simply a eidolon all his life and that Sammy was the real version. He saw Sammy as a confident, smarter, cooler, and funnier version of himself. This slightly depresses Leo, who finally understands why Hazel loved Sammy so much and that he isn't Sammy.

Just then, the flashback shifted again to an old house in a weedy field with an old man sitting on the porch. Leo quickly figures out that Hazel was showing a memory of his life, not hers. The old man calls out to Hazel and the two think he knows they are there, but find out that he was only talking to himself. As the old man thought about Hazel, he used Morse code by tapping his fingers to say I love you. Just then, Leo's mother walked out from inside the house carrying a baby Leo in her arms and introduced him to his great-grandfather. The old man smiled at the baby as he held him and Leo found out that Hazel's power had found the one moment when their two timelines met, as the old man was Sammy.

Sammy held the baby and told him that he hoped to live long enough to meet Hazel one more time, but the curse wouldn't allow him. Leo would have to be his stunt double and tell Hazel something for him. Hazel remembered what Gaea had said about Sammy dying of a heart attack in the 1960's, but that can't be as he is much older. Sammy continued to talk to Leo, telling him that a woman named Doña Callida said that Hazel's great danger would not happen in his lifetime. Because of that, Leo would have to tell Hazel that he was sorry and to help her if he could. He then admitted that he did sell the diamond after Hazel was taken to Alaska, using the money to move to Texas and open a machine stop. However, because he sold the diamond, he had always felt cursed as he never saw Hazel again.

Hazel called out to him, saying that she wanted to come back, but she died. Sammy then gave Leo his blessing and told him to say hello to Hazel for him. He then gave Leo back to Esperanza before saying that he was tired and needed to rest, also saying that he had a good life.

The House of Hades
Hazel thinks about how every time Leo smiles or jokes, it reminds her of Sammy.

Personality
Sammy Valdez is very quick witted. He tends to make jokes and is able to use them to help get others out of trouble. Even the other kids at the St. Agnes Academy called him Hammy Sammy. However, he could be very sweet, especially to Hazel who he loved. He looked out for her and surprised her with a birthday cake after taking her riding. He considers never seeing her again to be a curse. When Leo sees Sammy in a flashback, he considers him to be a smarter, cooler, and funnier version of himself.

Appearance
Sammy Valdez is a Mexican American boy who looks almost exactly like his great-grandson, Leo. He is said to have a crazy smile and a look that makes teachers shout "Don't even think about it!".

Sammy is also somewhat short like Leo and has the same curly brown hair. He wore a white cotton shirt, trousers, and a jockey cap (even if he didn't race horses). At one point he had a dunce cap, to which Leo said that if he had it on, he would look like a gnome.

When he became older, he is very thin with leathery skin and gnarled hands. His hair was completely white and he had a perfect set of teeth. He wore a pale yellow shirt with suspenders, gray slacks, and polished black shoes. However, despite his old age, his eyes were still sharp and clear.

Trivia

 * Before he died, Sammy told Leo he would have to be his stunt double. This is somewhat appropriate as Leo looks just like him, but Leo has to face all the danger.
 * Sammy knew Morse code and presumably taught it to Esperanza, who taught it to Leo.
 * Despite Gaea claiming that he died in the 1960s, that would make Leo over 30 years old, as he was born before Sammy died. Because of this, it can be proven that Gaea was lying.
 * Sammy took care of horses growing up and is a good rider.
 * Sammy is able to get himself or others out of trouble with humor.
 * Sammy has some skills with mechanics, opening up a machine shop later in his life.