|English voice||Johnny Yong Bosch|
|Game debut||Yo-kai Watch|
Lucas has black hair of average length at the back, though at the front he has a long side fringe that covers a large portion of the right side of his face. He has large rimless glasses and dark gray eyes. He wears a yellow coat and blue jeans.
Lucas appears to be a quite shy but good-natured boy, even when confronted with unknown situations he doesn't seem to get fazed easily, and althought he was born a yo-kai, he enjoys living and being raised as a human.
Lucas makes his debut in the first game, he doesn't play much of a role until the last chapter "Farewell Yo-kai". After having a prophetic dream, he reveals to Nate/Katie that he's able to see yo-kai and holds the key that connects Springdale to the Yo-kai World. He is later revealed to be the son of King Enma.
After the main story is cleared, talking to Lucas will give you the option to fight McKraken again.
Yo-kai Watch 2: Bony Spirits/Fleshy Souls
Completing Lucas' sidequests in the second game is a requirement for the player in order to befriend Wobblewok.
Yo-kai Watch 3: Sukiyaki
After completing the sidequest "Enma Note", a second part of the quest will be unlocked, Nate is asked to help Lord Enma to "revive" all the yo-kai that have been vanished by the Enma Note, it is later found out that Lucas' name was among the list of Yo-kai in the Enma Note that had been erased.
After Lord Enma finds Lucas inside the notebook's yomakai, Lucas is asked if he also wanted to become king, to which Lucas denies and explains that he is happy enough living in a world where humans and yo-kai can co-exist peacefully.
King Enma was Lucas' father.
Lord Enma is Lucas' nephew, as revealed in Yokai Watch 3: Sukiyaki.
Lucas is in the same classroom as Nate and Katie, Lucas often aids them by revealing his prophetic dreams to them.
- In the anime, he is mostly a background character and his ability to see yo-kai is never mentioned
- Depiste being a yo-kai, he doesn't have his own medal and can't be befriended
- His yo-kai form has never been revealed.
In other languages
- Spanish: Fausto
- German: Lukas
- Italian: Lucio