Too much non-relevant info and not enough details.
 
	 
 
	First, being a member of the Alphabet Tribe has no bearing on whether she needs a return ticket.
 
	 
 
	Secondly, is she an American citizen?  
 
	 
 
	This would be simple:
 
	 
 
	If she is a returning green-carded Filipino, then no.
 
	If she is an American (or non-Filipino), then yes.
 
	If she is a former Filipino, then no (Balkbayan).
 
	If you're Filipino and she is non-Filipino and you are traveling together, then no (Balikbayan)
 
	 
 
	That covers all the scenarios I could think of.
 
	 
 
	If she a crossdressing, gay, African-American, combat veteran with one leg and eye, the above still holds.