“‘Roboute,’ said Yassilli suddenly. He glanced sidelong at her use of his given name.
The liberty had been taken only once before, and recently, and though he had not rebuked her for speaking this way it took him by surprise, she could tell.
‘What?’ she said, mischief lifting the corners of her mouth. ‘It is your name, isn’t it?’
‘It is,’ he agreed, his voice no less stentorian. ‘Although I’d half come to believe my name is “my lord” or “the Imperial Regent” or “blessed primarch”. A term I find particularly irksome.’
‘Do you find my use of your first name impertinent?’
‘Absolutely,’ he said wryly. A little of the demigod’s tone slipped from his voice, a little warmth took its place.
Yassilli was hardly abashed. ‘Then I apologise, my lord Guilliman.’
Guilliman stopped his walking and looked down at the woman. ‘I said it was impertinent, I did not say I disapproved, Yassilli.’ His voice softened further, becoming yet more human, and his heroic expression did not change exactly, but he somehow became more relatable. ‘I find your familiarity refreshing. It is good to be reminded that I am a person as well as a primarch. And I do have a sense of humour, despite what you might have heard.’
…
‘You really have no fear of me, do you?’ he asked. ‘I find that amazing, as well as saddening. Everyone is frightened of me now.’
She flashed her brilliant smile at him. ‘I suppose I should be frightened of you, but no, I’m not. There’s plenty to be afraid of in this galaxy. Why be afraid of the one who is trying to save us?’
He loomed over her, his eyebrows drawn together, two disapproving thunderheads shadowing his eyes. ‘I am Roboute Guilliman, primarch, gene-engineered son of the Emperor of Mankind. I am the Avenging Son, the Victorious, the Blade of Unity, the Master of Ultramar. I am the Imperial Regent. Empires tremble before me. I was made one hundred centuries before your birth, millennia before your House rose to prominence. I have fought daemons and defied beings that call themselves gods. Species have died at my hand. Now, tell me again, do you not fear me?’
She stared up at him. Her smile was a little less cocky, but she was still wearing it, proud as a badge. ‘When you put it like that, maybe I do a little bit.’
Guilliman returned her smile tenfold. Some faces are transformed by smiles; Guilliman’s was not one of those faces. Warm though his expression was, he retained the look of an image carved from marble to grace a cenotaph.
‘More impudence,’ he said, though his tone was kind. He resumed his walking. ‘You may call me Roboute, if you wish. I miss such signs of common feeling.’
‘I thank you, Robu,’ she said.
‘Now you overstep the limit,’ he said.
‘I am sorry, my lord.’
‘Somehow, I doubt your sincerity,’ he said, still smiling.”
–Plague War