But there are different kinds of love. A dog may love you, but it will never be able to love you in the same way as a human. In C.S. Lewis' excellent book, The Four Loves, love is divided into four categories:
- Storge: This is fondness through familiarity. It is the bond of family, or others who have likewise found themselves together by chance.
- Philia: Literally friendship. This is different from the other loves because it is the least necessary. A species does not need friendship to reproduce, but it is considered a higher-level love because it is freely chosen.
- Eros: Romantic love. This is connected to but distinct from Venus (sexual attraction).
- Agape: Unconditional love. It brings forth caring regardless of circumstances. The essence of Agape is self-sacrifice. It is the highest form of love, and the other three must be subordinate to it in order for spiritual growth to occur.
Agape is the focus of the Bionicle story. It is the duty of the Toa to fulfill it for the rest of the universe, even at the cost of their own lives.
So basically the only love that is considered to be "non-canon" would be Eros, where the characters have romantic love for each other (which is basically what was depicted in the case of Hewkii/Macku & Jaller/Hahli, in which case it appears that they were allowed Philia because they were considered great friends despite their differences.
Storge is most often seen in Toa Teams, before they become true friends (Kopaka/Pohatu) where they at the least tolerate each other and at most, form a sort of family among themselves.
Matoro is of course the embodiment of Agape, when he willingly sacrificed himself to save the entire universe. (the Ignika also followed suit when it destroyed it's new body to awaken Mata Nui (although one might argue whether a mask is capable of true agape love, but I'll leave that up for debate).