Question: From the radio series "Archie Andrews", who is Archie Andrews' frenenmy?

Context paragraphs:
Life with Archie: Life with Archie was a comic book published by Archie comics from 1958 to 1991.  It featured Archie Andrews in adventure stories that were more dramatic than the standard Archie tales.  In 2010, it was revived as a magazine-sized comic devoted to stories that grew out of "Archie Marries Veronica/Archie Marries Betty".  Archie's character was killed in the second to last issue, "Life with Archie" #36.

Archie (comic book): Archie (also known as Archie Comics) is an ongoing comic book series featuring the Archie Comics character Archie Andrews.  The character first appeared in "Pep Comics" #22 (cover dated December 1941).  Archie proved to be popular enough to warrant his own self-titled ongoing comic book series which began publication in the winter of 1942 and ran until June 2015.  A second series began publication in July 2015, featuring a reboot of the entire Archie universe with a new character design aesthetic and a more mature story format and scripting, aimed for older, contemporary teenage and young adult readers.  Even the printed comic book format is different from the previous publications.

Reggie Mantle: Reginald "Reggie" Mantle is a fictional teenager in stories published by Archie Comics.  Created by writer-artist Bob Montana and John L. Goldwater in "Jackpot Comics" #5 (cover-dated Spring 1942).  He is a frenemy of Archie Andrews.

Archie Andrews (puppet): Archie Andrews was a ventriloquist's dummy used by ventriloquist Peter Brough in a radio and television show in the UK in the 1950s and 1960s.  In its radio format it was called "Educating Archie".  Archie was invariably dressed in a broad-striped blazer, and addressed the ventriloquist as "Brough".  The television scripts were written by Marty Feldman and Ronald Chesney.

Archie and Me: Archie and Me was a comic book title published by Archie comics from 1964 to 1987.  Most issues and covers focused on the interaction of Archie Andrews and the school principal, Mr. Weatherbee.  This suggests that Mr. Weatherbee is the "Me" mentioned in the title, whereas the "Me" in "Reggie and Me" and "Betty and Me" appeared to refer to Archie Andrews himself.

Betty Cooper: Elizabeth "Betty'" Cooper is one of the main characters appearing in American comic books published by Archie Comics.  The character was created by Bob Montana and John L. Goldwater, and first appeared in Pep Comics #22 (cover-dated Dec. 1941), on the first page of the first "Archie" story, serving as a love interest to Archie Andrews.  Betty's infatuation with Archie making her strive for his attention using whatever means possible has been one of the longest running themes in the comics.  In 2011, Betty Cooper was ranked 66th in "Comics Buyer's Guide's" "100 Sexiest Women in Comics" list.

Archie Andrews: Archie Andrews, created in 1941 by publisher John L. Goldwater and artist Bob Montana in collaboration with writer Vic Bloom, is the main character in an American comic book series published by Archie Comics, as well as the long-running "Archie Andrews" radio series, a syndicated comic strip, "The Archie Show", and "Archie's Weird Mysteries".

Love Showdown (Archie Comics): "Love Showdown" is a four-part comic book story arc, first published in 1994, featuring the characters from Archie Comics.  Publicized as a possible resolution to the decades-long love triangle between Archie Andrews and his longtime sweethearts Betty and Veronica, "Love Showdown" received more publicity than any other event in Archie history.  The story, written by Bill Golliher and Dan Parent, was originally published in "Archie" #429, "Betty" #19," Betty and Veronica" #82, and "Veronica" #39.

Hal Stone (actor): Hal Stone (aka Harlan Stone), died February 21, 2007, was a radio actor best known for his performance as Jughead on the "Archie Andrews" radio series.

Archie Marries Veronica/Archie Marries Betty: "Archie Marries Veronica/Archie Marries Betty" is an American comic book story by writer Michael Uslan and artists Stan Goldberg and Bob Smith that was originally presented in "Archie" # 600–606.  In issues # 600–602, the story features a futuristic look into the life of Riverdale teen Archie Andrews in the years that follow his college graduation when Archie makes his ultimate decision to marry Veronica Lodge instead of Betty Cooper.  In Issues # 603–605, the story switches and Archie proposes marriage to Betty instead of to Veronica.  Issue #606 serves as the epilogue to the story and ties the previous six issues together.

Supporting paragraphs: Reggie Mantle Archie Andrews
Answer: Reginald "Reggie" Mantle