Extroverted Thinking (Te): Te is what makes Minako the ideal leader of the Senshi. Her first scene in the Sailor Moon manga had her commanding the Senshi to remember their past lives as Serenity’s guardians. Further on, when Serenity and Endymion were killed by Serenity’s own hand, Minako deduced that she and the rest of the Senshi would need to lay down their lives to revive Serenity and quickly convinced them to do so. Her Te is so strong, that during the Black Moon arc, when Mercury and Jupiter were abducted, Minako pressed Chibiusa for information, intimidating the little girl. She was angered that she couldn’t get any information out of Chibiusa, whom she suspected was related to the Black Moon Clan’s plans. Minako’s Te imparts to her an acute awareness of what needs to be done for the Senshi to accomplish their goals, and an unwavering determination to lead the Senshi into realizing their ultimate goal.
Introverted Intuiting (Ni): Minako is extremely future-oriented, and even has flashes of the future, in the form of recurring dreams in which she sees Usagi’s corpse. At the end of C:SV, she was faced with the decision of taking Danburite, a Dark Kingdom minion as her one true love, or she could continue on with her mission and kill him. Minako refused to give in to her Fi, and for the sake of her mission, killed her only chance at happiness and a comfortable teenage life. She knows best what could lie in the future of Princess Serenity, and by extension, the Moon Kingdom.
Extroverted Sensing (Se): Minako is extremely athletic and in touch with her Se. She is an expert volleyball player. Her tertiary Se translates into a quick physicality, shown multiple times. She kicks a brainwashed Makoto into unconsciousness when Makoto was about to hurt Usagi. She often kills youma with one kick and is quick to use the stone sword to kill Beryl in the final battle of the first arc.
Introverted Feeling (Fi): Minako denies her inner feelings a lot, masking the wounds on her heart with a hypercompetitive, feisty, world-is-mine approach to life. Her Fi is constantly being repressed by her, only to come bubbling to the surface as insecurity about being fit to lead the Senshi, as shown in the Venus dream chapter. Fi is also expressed in frustrated outbursts, such as when she screams at Rei that yeah, she’s not graceful, or well-behaved. Minako’s insecurities are manifestions of a broken Fi, something that she tries to ignore, sometimes to her detriment.
Note: Minako Aino’s functions are Te-Ni-Se-Fi, aka ENTJ, or the Executive. it should be noted that this is during the Sailor Moon manga, not the Codename: Sailor V manga, in which Minako was an ESTP. I originally had Minako pegged as an ENTP before, but I realize that her Te is too strong to be of that type.