Sorry, I responded late. Very busy and tiring week. Blair in my opinion, is the most straightforward and safe LI in the game. No baggage through means of being in another relationship/marriage (Evelyn), family issues (Julie), lacks confidence/identity of oneself (Stella), proving one's self-worth to family/society at large (Viv), the list goes on.
Straightforward in the sense, Blair isn't secretive and is open about her feelings whether they could or couldn't negatively affect Jade's (the player's) opinion on her. Blair wasted no time in admitting that she's unsure about taking on a promotion which would distance herself greatly from Jade, as well as confessing to Jade that she is pretty much in love with her, despite being around each other for so little time.
This might be a big reach, but I mentioned "safe" for Blair because I believe she is also supposed to be the 1st person of many that Jade truly opens up/attaches to others after years of being a loner without backlash (exceptions being Dimitri and that new girl from her past)