How we cite our quotes: Book, canto, stanza
Quote #4
But his good Squire him helping vp with speed,/ With stedfast hand vpon his horse did stay,/ And led [Arthur] to the Castle by the beaten way. (II.xi.48)
Another instance of Arthur-Timias love, but this time around its Timias who saves Arthur—it works both ways in this whole "loyalty" system.
Quote #5
Thus reconcilement was betweene [Britomart and Guyon] knit,/ Through goodly temperance, and affection chaste,/ And either vowd with all their power and wit,/ To let not others honour be defaste. (II.i.12)
Britomart and Guyon did not start things out on the right foot—she knocked him off his horse—but in the land of chivalry, that doesn't mean two good knights can't patch things up and vow eternal friendship.
Quote #6
The warlike virgine seeing his so prowd/ And boastfull chalenge, wexed inlie wroth… And sayd, her loue [Amoret] to lose she was full loth,/ But either he should neither of them haue, or both. (IV.i.10)
Britomart shows her loyalty to Amoret by assuming the attitude of a knight defending his right to protect his beloved—there doesn't really seem to be the same language available to Britomart to describe the loyalty between two female friends.