One of the best things about Bungou Stray Dogs is that most of the relationships aren't labelled. You know most of the ships aren't canon, which is a unique step taken by Kafka Asagiri, and, unpopular opinion, the non canonizing of relationships is important for seinen series of the like.
I personally feel like, for a show which is heavily focused on psychology, relationship dynamics, banters, the non labelling of most ships keeps them open to interpretation, allowing fans to speculate, have fun, while at the same time enjoy the show for it's main story.
We have Kunikida and Dazai, who are co-workers, haven't been labelled as “friends” or “lovers”.
Atsushi and Kyoka who care for each other intensely, but haven't been labelled as “siblings” or “lovers” or any of the sort
Ranpo and Dazai who have immense respect for each other, but haven't been labelled as “friends” or likewise.
Ranpo and Yosano who have found each other, and are often interpreted as found family or siblings or even lovers, but haven't ever been labelled.
Fyodor and Nikolai, they have a complex dynamic, somewhat like a God and their worshipper, and again we don't have a singular name for what they feel for each other.
Dazai and Chuuya... Now these two are complicated as heck, and you can never really call them just rivals, just enemies, just friends or just lovers.
So yeah, basically I just love the fact that most of them have a name for their relationship, like co-workers, partners, mutuals, etc. Yet at the same time, most of the times, their relationships haven't been labelled as “lovers” or “friends” or “siblings”. In what way one feels for the other, apart from the established perception, is open to interpretation, thus allowing fans to dig deeper into the nature of their dynamic/ banter, exploring feelings that don't often have a name, feelings that go beyond love or friendship.
