If she’s bullying you, you’re okay. Anko’s surface personality is what you would expect it to be: loud and harsh, with no room to humor stupidity or mistakes.
Those who know her better know her in her quiet moments, and outside the absolutes and ultimatums she spews at the world daily. Alone she is a book nerd, a lover of sweet drinks, and days spent cooped up in her apartment studying ancient seals and the philosophies of forbidden jutsu.
Anko justifies her beliefs by pretending she lives in a gray world, where the morality of a choice depends greatly on the situation. Konohagakure does not nurture such sentiments but they are ones she clings to regardless. She is the friend you want beside you when it’s all gone to shit in a handbasket and you need the one person both brave and stupid enough to do what has to be done to get you all home.
Anko’s loyalty to Konoha is sometimes in question, because she is highly critical of Konoha’s politics. She is an outspoken advocate for the people she feels have been abused by the system and, if given the opportunity and a cause she believed in enough, she would make any sacrifice necessary to see what what happened to her never again happens to someone else.
That being said, I don’t roleplay Anko as a dissident. She is highly critical of Konohagakure but she is not under the delusion that there will be a full reform of old practices any time soon.
Don’t be too put off by her sharp tongue and caustic nature. She doesn’t mean a bit of it. But it’s going to get worse before it gets better, and any attempt at honest friendship will be a work in progress.
I headcanon that Anko has Bipolar II Disorder. Whether or not it manifests in a severely debilitating way is AU dependent. Generally, though, you can expect her to experience the hypomania and depressive episodes someone with her diagnosis would have. In Naruto-verse, this problem goes undiagnosed and untreated, further complicating her already impressive list of issues.