Character question

[Birdie]

I have a design that I would love to join, unfortunately, she has a horn. My first character I joined with Immortality, and I would really like for her to keep it. However, I am willing to sacrifice it need be. I did want to see, if it would be possible, for me to join her but to have her traits be nongenetic? 

Here is the design: Clicky 

The flowers and vines would be purely decorative. Let me know, thanks in advance.

[Kyra]

That’s fine this time. You can join with the horn.

[Birdie]

Thank you!