i'll add on multielement eidos too then.
even if game do name them "multi", they have priority element. means, for example Fafnir has fire/water element attack up, BUT - her main is fire, and while u can put her on both fire/water team (on a side note, she has really nice attack while flb, but i doubt new player will flb her) - ppl will just see nothing on your water team - your eido just wont show up at all, since game thinks Fafnir is fire