Kimi, it gets pulled from there indirectly. It gets pulled directly from what is in field .212, K-RELATIONSHIP TO PATIENT, of the VA PATIENT file. Field .212 gets triggered from field 2802, NOK RELATIONSHIP, of the PATIENT file and field 2802 is a pointer to file 9999999.36 - RELATIONSHIP. So whatever is in .212 indirectly gets set from ^AUTTRLSH.
The problem is that there isn't a translation of most of the entries from RPMS - RELATIONSHIP file entries to the official 2.5.1 list. That is something that should probably be done as part of the next version of the data exchange. There are 125 some entries in the RELATIONSHIP file, less than 2 dozen as I recall from the official 0063 table in 2.5.1
For any that don't make a direct match they are translated to the generic 'guardian' category.