Mycroft is gay or possibly homoflexible. He’s a bottom, and (if you think he’d be into that) a submissive.
Mary’s bi. She’s a powerbottom and a domme.
Anger/Violence-
I headcanon the Holmes brother as autistic, so I feel like when it comes to anger, most of Mycroft’s lashing out/getting upset comes from sensory issues or being overwhelmed like for me. He can tend to shy away from violence or get squeamish around blood, but only when it’s just him. If he has to be around people then he’s completely iceman for anything.
Despite Mary’s backstory and how she’s definitely not afraid of violence, I don’t think she’d have much of a temper. I feel like she’d have a generally calm demeanor, but when in a fight, she can very much snap into action.
aries: MAJOR PLEASE, I’M JOHN WATSON, FIFTH NORTHUMBERLAND FUSILIERS, THREE YEARS IN AFGHANISTAN, A VETERAN OF KANDAHAR, HELMAND AND BART’S BLOODY HOSPITAL. LET ME EXAMINE THIS BODY.
taurus: because sherlock holmes thinks it’s a perfectly OKAY THING TO DO
gemini: tell me where my wife is or i’ll punch ya lights out, ya pompous prick
cancer: they’re givin’ me an asbo
leo: why is everything always MY FAULT
virgo: DAMN MY LEG
libra:
no it’s NOT it’s NOT OKAY
scorpio:
SHEEEEERLOOOOCKKKKK!!!!
sagittarius: SWEAR TO GOD
capricorn: WHATEVER YOU’RE DOING IN THERE JAMES, STOP IT RIGHT NOW, I WILL KICK THIS DOOR DOWN
aquarius: THERE IS NOTHING THE MATTER WITH ME imagine i said that without shouting