I see Magnus as a bigger, clunkier type. Like that picture with the large robot and the smaller, human-looking girl side by side. But not so large that he'd be impossible to put on a ship.
The two of them wandered through the ship. Magnus inquired about several things, like the history of the Quarians and the nature of the Geth intelligence, which Linya answered to the best of her ability. She asked Magnus about what it was like to have a robotic body. Finally, they came to a hallways lined with doors. Linya opened one up and invited Magnus into her room.
"Well," She began, "This is where I've lived most of my life. This room can be sterilized so that I can take off my suit for maintenance and when I just want to lounge around. There's a vidscreen, a computer, furniture, and so on."
"Not bad. I like the computer but I don't think this chair would hold me." Magnus rocked the chair for emphasis.
"So, I guess what I would like to know most about is how your body processes sensations. You used to have an organic body with nerves, do you still feel things now?"
"Well, it's a little different, and I can choose what I feel and when. Pain isn't there anymore. Instead it's just an information feed about damage, lets me focus on what I'm doing. Touch is pretty much the same, I can detect heat levels, heck I can even alter my own body temperature so that I can operate in extreme climates."
Linya noticed that Magnus had left out one very important physical sensation, and she was incredibly nervous, but also incredibly curious. "What... what about, you know..."
"What about what?"
Linya stared a hole in the floor. "Well, you've told me how most of your body works, but you didn't tell me if you still feel pleasure." Her voice had dropped at the end, as she tried to cut herself off, but the result was instead sultry and seductive, an effect she had not expected.