In case you needed even more reasons to go read Monstrous Regiment, there is also a canon lesbian couple in the book, Tonker (Magda) and Lofty (Tilda).
Together they escaped from the Girls’ Working School—an institution where “Bad Girls” [aka anyone who breaks the absolutely ridiculous religious rules in Belgravia] go—and joined the army, intent on putting it as far behind them as possible. They’re absolute sweethearts and totally in love, always holding hands whenever they’re on patrol together.
Tonker is intensely protective of Lofty, and seems to be the only one who can get past how quiet the other girl is; Lofty, for her part, mostly keeps to herself and finds joy in fire…as in, she always seems to find matches and can make explosives from anything.
They disappear after the main events of the book, but the last Polly hears, the Girls’ Working School is burnt down and two slim hooded figures robbed the nearby bank…
(also I’ve been drawing the ladies in the tailored uniforms they get at the end because the book doesn’t really clarify if everyone gets every piece of regalia from the army stores, as it’s all shoddy and pilfered off of already dead soldiers x: )