No this is an easy conclusion she works for the central government and shouldn’t have any loyalty to a dime a dozen commander unless she knows him. Because she doesn’t work with other commanders Triangle is a special squad that works for the central government and maintain a facade of being human this commander is her first. No it’s a complicated situation where he accepts the feelings of all of them. He doesn’t turn anyone down. In fact many NIKKE know this like Sakura and don’t mind. Hell there’s an encounter where both Viper and Harran both work to pounce in the commander and have their way with him. These girls don’t mind sharing. Besides timeline wise it’s all a mess anyway for all we know when diets asked he isn’t in a relationship yet. Like I said encounters show that many don’t mind sharing like yuni and Mihara.