To provide some context for the comic portion in Volume 8: Phil is haunted by the breasts of Elicia and Nagi while they're taking a bath together, so she begins wishing to meet Fiona again, a fellow flat-chested comrade of hers. Fiona suddenly appears "all grown up"; she greets Phil but Phil just goes "might I ask who are you supposed to be?" after taking a look at Fiona's breasts. Fiona repeats herself saying its her and that she's suddenly and magically grown up after her last encounter with Phil. Phil blacks out, then wakes up to see both Elicia and Nagi worriedly looking at her; apparently it was just a dream and she blacked out in the bath. After waking up and seeing Elicia and Nagi's breats, Phil decides that whether in a dream or in reality, life is just too cruel and harsh for her while floating face down in the tub.
So yeah, Phil. XD She shouldn't mind though; in an alternate universe (namely Vanadis's world), her character equivalent there has THE largest breasts out of everyone (Sophiya)!