Words I associate with the KoS are cartesianism, cerebral, analytical, rationalist... It's the person (if a person) that needs to understand the logic behind things.
This type of person doesn't just look at how it works, he/she needs to understand how something [element A] makes something else [element B] do what it does, if you will, so that he/she knows how to make it produce what he/she wants and when he/she wants.
I'd say this type of person could be really helpful in a crisis because they can keep a cool head and really try to stick to the facts and not get swayed by other things.
They can also be great judges/decision makers and make me think of the the judgement of King Solomon with the two mothers and the baby.
Specific to persona and in the context of relationships, I wouldn't say this person doesn't feel but rather that they can easily set their feelings aside to make the most rational/logical/"right" decisions.
They'd probably need to process things mentally before they decide how to act (and sometimes that can be quickly and others not - not all decisions can be rushed) and would be quite decisive and focused when they've decided.
They'd probably have a clear idea of what they think is right and wrong, true and false, etc.
In terms of sense of humor they'd definitely would use deadpan humor and dry wit (Oscar Wilde, Churchill's sense of repartee, etc.). I also associate it with that Seinfeld, very quick comeback sort of humor.
Not necessarily charismatic, can come off as aloof and standoffish, rather stern. If you watch Game of Thrones, I'm actually unsure if I see Lyanna Mormont as a more QoS or more KoS (she definitely acts as a leader, and an active one at that). If you don't, it's really a detail LOL I try to match personas I see on TV/in movies to archetypes, in part because those are particularly archetypey sometimes.
Definitely requires a meeting of the minds for bonds to have value. As well, probably, as a meeting of values/moral (I'd say that if you're in sync morally and in terms of value, you'll find someone quite loyal on the other side).
For what it's worth, my 2 rusty cents
