kaizer☆

Her middle name being a guys name (Eugene) and VERY rarely mentioned, in comparison to Tuffnut’s middle name (Laverne) being gender neutral (although more feminine) and mentioned a lot in rtte

Her name being unisex

Being mistaken for a man fairly often, even when Tuff isn’t around (“Snotlout’s angels”, Atali thinking she’s a guy when the only other people around are Heather and Astrid, implying she looks pretty masculine compared to other women in the series)

Being very obviously offended by being mistaken for a man

The only girl with a male dragon

A whole episode called “Ruff transition”, although referring to her having to raise a baby dragon and not a gender transition**

Her deep / raspy voice, perhaps the result of a lack of available voice training

“Has anyone ever told you that you look like a boy?”

Not having children despite being married in homecoming and 29 years old (average lifespan of a Viking was 35-50 years and most got married and had children in their teens/early 20s), could of course be a personal decision but I like to take it as her not being able to have biological children with a cis man because of her being trans

Perhaps the most obvious, but her being and identical twin. I know the whole Thorston family’s thing is all of them looking identical, but I like to use this as fuel for this headcanon