I won't refrain from explaining what I believe to make the most sense because someone will feel threatened. No apologies.
Between the two of us, I'm not arguing that my interpretation is only one that makes any sense or is the only one that players could reasonably interpret or roleplay based on the information presented in the game.
Please don't misunderstand. I'm not saying everyone has to roleplay Surana as identifying with elves. I'm simply saying it's an option for people who want to roleplay it that way, since the game provides plenty of dialogue options for Surana to express those views. (Surana receives just as many comments for being an elf as a mage, Surana can say they were mistreated in the Circle for being an elf, and Surana can express kinship for other elves and/or express a desire to get to know his/her people at various points.)
Of course, this idea of yours may work if the mage in question happens to be a late bloomer...which seems to be the minority. They usually awaken their gift and are sent to the Circle as children. And there is precious little one remembers from their early childhood.
Most people start to retain memories from around the age of three or four. Various comments from various mages across the franchise have implied that children more often come into their magic closer to their double digits than their terrible two's. (Wynne was nine when she came into her magic, Anders was twelve, the real Cole was practically a teenager, Fiona came into magic after age seven, etc.) Those who come into their magic as early as four or five (like Jowan, possibly the Mage Warden) are less common.
Furthermore, since most Circle mages you encounter across the games, comics, and novels have pretty clear memories of life before the Circle (at least enough to say whether they were a peasant or noble, lived in a farm or alienage, etc), it's likely that to pre-Circle memories are more common than, "I can't remember anything before the Circle."
Surana was born in the alienage. Not raised.
So? Again, depending on when you imagine Surana was taken away (the game keeps it vague so you can decide whether s/he was taken earlier than s/he could remember or later childhood), s/he could still have plenty of good memories from the alienage, identify with them as "her people" rather than the humans in the tower s/he was forcibly chucked into, s/he could prefer what s/he remembers of life before the alienage, etc.
Besides, one doesn't have to be exclusively raised in an Alienage or Dalish Clan (from beginning to end) to experience prejudice by humans for being an elf, identify with other elves, identify more with elven history and culture over human history and culture, etc. There is no one universal experience for elves to feel like elves.
Just because she wasn't raised with her people doesn't mean she wouldn't identify with them. If she looks different from everyone around her, and everyone treats her differently because of it, of course she would feel like an Elf and not a human. And it's highly likely she was treated differently on top of that for numerous reasons -
- You get dialogue to say she was treated differently for being an Elf
- Another Elf get's dialogue saying he was treated differently for being an Elf
- Kids often bully anyone who is different or smaller than they are, she was both of these things
- Elves have an affinity for magic, which would lead to Templars being more suspicious of her, and other kids being jealous and saying any success she has was because of her race
So it's very likely she wouldn't feel "human" at all due to these reasons. She might not have experienced poverty in an alienage culture, or Dalish culture, but she would want to know more about her people (there are dialogue options to say this too) and would want to be among them where humans didn't look down on her.
You can play her differently to this if you want to, but that doesn't mean it doesn't make sense. If it didn't make sense, Bioware wouldn't have put numerous dialogue options in the game saying this is exactly what happened, and also other NPCs who agree with it. It's incredibly naive to think that as soon as an Elf steps into a circle, racism dies or they stop realizing they are different from everyone around them.
You answered far more eloquently (and patiently) than I could. 