Even our modern Integra still doesn’t know about Girlycard. She was out of the room when Girlycard fanart was turned up during the second fangirl storyline, and Girlycard’s appearance during their stint in Victorian England got written out of the timeline.
Alucard (thinking): One last change, and she’ll have no way to know me.
And now, the dramatic entrance!
Alucard: This would be much easier if you would pay attention!