jyn may not seem it but she is sentimental. she'll keep little mementos or keepsakes from fond times or name ships/weapons after people she's known. she'll be kinder to sentients that remind her of other places or individuals. and while she's not superstitious ( doesn't really believe in a ' lucky weapon ' or things like that ), she does keep cassian's blaster after sca.rif and it becomes her main weapon during the original trilogy.