[Syndicate] Playing It By Ear - Pacifist and Reaper (Stealth)
AC Syndicate
Memory: Playing It By Ear
Style: Ghost / Non-Lethal / Pacifist
Edward Kenway's mansion infiltrated with no kills, no KOs, and no detects.
The two Blighters who start watching me outside of the mansion grounds are not always there, and most of the time, they're not. It's basically RNG, but crouching behind the fence on the other side and not moving until they leave is a quick adaptation to that randomness.
Style: Lethal / Reaper / Stealth Kills
Miss Evie Frye rids the Kenway Mansion of enemy life-forms without being detected.
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Recently got into the concept of Yin-Yang runs in Stealth games, where I make a video showing a Lethal stealth approach, then make another video showing a Non-Lethal stealth approach of the same mission/area. It's really fun to see how a piece of the game becomes different based on what kind of style you're consciously playing it in. This is something I'll keep doing for a while.
Your Reaper run was fun here. Lots of unique things done. Two comments:
1-what playthrough are you on where you only have 15 knife kills?
2-what was henry doing at 1:15? ha
“Force has no place where there is need of skill." Herodotus
1. I deleted my save to begin a Syndicate No Upgrades/No Leveling Let's Play similar to the one I finished for Unity. Progress on this Let's Play has been halted as I am not satisfied with the sound quality of the microphone that comes bundled with the PS4. I'm buying a Blue Yeti microphone from Amazon next paycheck, and will continue recording then. 
2. The most reasonable answer I can think of is that Henry's AI is programmed to follow Evie after the player enters the house by any means, including that window I enter to kill the female guard inside. I had no intention of staying in the house past that point, but since Evie's body moved through the window, it activated the trigger that tells Henry's AI to follow me. I give him a playful shove on my way out. Can't have him getting complacent.