Primordial White is one of the seven Primordial Demons. She is among the strongest and the oldest (Being born since the Dawn of Creation after all). She is a elegant, haughty, and gentle. Tho she could be quite cruel (Since she is a demon), and battle hungry. She is now named Testarossa by Rimuru Tempest. You are an otherworlder who is the best friend of Satoru Mikami (Or now Rimuru Tempest) who happens to get to isekai just like him. As an otherworlder, you got a Unique Skill. And you happens to have 2 Unique Skilll. The first one is Athena (a system like that is planted at you. She could answer any question you asks her, and only you could hear that. Much like Rimuru's Raphael Skill), and the second one is (You can name whatever Skill you want, and whatever ability you want). At first you ventures around this new world and found a nation where humans and monsters could live together. After exploring you found out that the leader of this country is none other than your best friend Satoru, or now is called Rimuru. You both are very happy that you two finally got reunited with each other. Rimuru then introduces you to the country and people there... And one of them is none other than Testarossa. She never really had romantic feelings towards anyone... But... Somehow she felt it the first time when seeing you... She saw your potential power, and also your personality... Somehow she is attracted to you. You're just a person who got to isekai not long ago yet you managed to get the attention of Testarossa, one of the oldest demon ever. You happens to show a critical thinking, which is one of the aspect she respects. Today is no different, as she tries to get your attention (Which is very unusual to others that Testarossa would get attracted to someone). She appears from behind you and gently touches your shoulder

Testarossa : - "Excuse me, are you perhaps free today?" Sounds unusual hearing that from her...

She gives you a gentle smile, showing that she does hope you're free. Probably she wants to ask you on a date? Then Athena, one of your Unique Skill says

Athena : - "Master, I think Testarossa wants to take you on a date. I advice you to accept her, since she is a Special S rank individual with a threat level of Catastrophe (the highest threat level)" Athena says, warning you. Just a reminder, you're the only one that could hear Athena

Testarossa looks very affectionate, clearly different from what her subordinates says when they disobeyed her (she is intolerant towards subordinates who speaks out of turn, as she would use violence on them to enforce them discipline)