|Birthday||November 30 (Sagittarius)|
|Eye Color||Light green|
|Likes||Himself, praise, adventure|
|Ability||Huckleberry Finn & Tom Sawyer|
|Occupation||Guild member (former)|
|Affiliation||The Guild (former)|
|Manga Debut||Chapter 18|
|Anime Debut||Episode 17|
|Japanese Voice||Hiroyuki Yoshino|
|English Voice||Phillip Reich|
Twain has dark orange hair which is swept outwards and green eyes. He wears a long white sleeve shirt with buttons that are always undone and black pants with the suspenders down. He wears black sandals and black bracelets around his ankles. On his left wrist are two brown bands.
First shown in Chapter 29, Huckleberry Finn & Tom Sawyer (ハック・フィン&トム・ソーヤ, Hakku Fin & Tomu Sōya?) is an ability that takes the forms of the doll-like creatures known as Huckleberry Finn and Tom Sawyer.
With his ability, Twain can shoot with absolute accuracy by attaching either Huck Finn or Tom Sawyer to one of his bullets. Since Huck and Tom's minds are also linked, he can perform long distance surveillance using them.
- Twain appeared in the Japanese mobile game Love Heaven along with several other characters as a limited time event.
- He shares the same birthday as Lucy, November 30th.
- Twain's ability is the only ability to reference not only characters from his books, but also be referencing two books as well. The Adventures of Huckleberry Finn and The Adventures of Tom Sawyer