One person sure to have Beau quaking in his desert boots is Doris -- the girl he left for the Legion.
Although having been featured many times, Doris has never been actually been seen in the strip -- we only see her speech balloons.
She is described as very ugly, having many chins, a large frame, an ape-like stance, short hairy legs, and generally terrifying. Her knuckles drag on the floor when she walks. Karloff would be an apt surname for her.
The young lady in the very first Beau Peep strip from November 1978 isn't quite as terrifying/hairy/gargantuan as Doris is described as, in the later strips. Roger Kettle explains:
She is still madly in love with Beau and has promised to remain true to him. Beau is trying to forget that threat. From September 1980
The Nomad certainly has the hots for her: From September 1980