This is just my opinion, this song is about relationship with someone who is not at all like you. "Gun shy sunshine" can mean the person doesn't enjoy violence and/or is sweet and innocent. While you hold on to your "headstrong highlights" because that is who you are. You're different from that other person , however you two share something similar "with our hands drawn and eyes dried". I think this means both of you will still always share a special connection/bond with one another.
This is just my opinion, this song is about relationship with someone who is not at all like you. "Gun shy sunshine" can mean the person doesn't enjoy violence and/or is sweet and innocent. While you hold on to your "headstrong highlights" because that is who you are. You're different from that other person , however you two share something similar "with our hands drawn and eyes dried". I think this means both of you will still always share a special connection/bond with one another.