Shen Lun

Shen Lun is the great-grandfather of Roman demigod Frank Zhang. He is also a legacy of Poseidon.

History
Shen Lun went to Camp Jupiter in the early 1900's because his family had roots connecting them to the Roman Empire. Despite being a legacy of Poseidon and a decedent of Periclymenus (a grandchild of Poseidon), the Roman Legion accepted him into the camp because of his powerful ability. Just like Periclymenus, Shen Lun had the ability to shapeshift into different animals, a gift passed down through his family. Although he is a legacy of Poseidon, because of his Roman blood everyone believed he was a legacy of Neptune. It was thought that he had caused the 1906 San Francisco Earthquake, but his name was later cleared by Frank Zhang in The Son of Neptune.

Banishment from Camp Jupiter
After Shen was allowed into Camp Jupiter because he was a powerful legacy, he wasn't well liked due to his Asian appearance, his relation to Poseidon, and his unusual ability, even though he had Roman ancestry in his lineage.

After the earthquake of 1906 in San Francisco, Shen Lun was accused of causing it, being that he was a legacy of the god of earthquakes, Poseidon. Despite Shen not having that kind of ability and with no evidence that he had caused it, Shen was banished from Camp Jupiter and New Rome. Years later, Shen Lun's name was still resented by members of the Legion.

The Son of Neptune
Before Frank leaves for Camp Jupiter, Grandma Zhang hands him a note with an apology for what Shen Lun had done, and tells Frank to give it to the Praetor of the camp. Reyna is the one who Frank apologizes to, but she orders him to not mention this to anyone.

After Frank manages to help save the camp from the Giant Army, people begin to talk about reinstating Shen Lun posthumously back into the Legion as there was no evidence to back up the claim that he had caused the earthquake of 1906.

Abilities
Shapeshifting-After Poseidon blessed Periclymenus with the ability to transform into animals, Periclymenus passed this gift on to his decedents. Shen Lun was able to use this ability, being able to transform into any living or mythical animal. The true extent of his transformation abilities is unknown.