Magic Knight Rayearth, Umi/Hikaru, elements
Even if they didn't have their powers- and they'd met otherwise- Umi'd be glad to have met Hikaru.
Their powers are rather a bonus, though, which she's often glad of at times- when she's cooled down too much, and Hikaru touches her cautiously, gradually bringing her back to warmth, or when Hikaru's taken too much upon herself, and Umi can hold onto her until she settles a little.