[nickjr]

Sumire really wants hearts, so if your current water team is the one that's in your PADHerder, then you have the following two not-mutually-exclusive options:

1) replace your leader with Sumire and just ignore the heart cross part of Sumire's leader skill most of the time; you'll be playing this team like a 25x 5-match* team, and if you do this, then you've got a lot of pairing options: Alrescha, You Yu, fellow Sumire, Skuld

2) build a new team for Sumire and take advantage of her heart cross thing for a major boost in damage; your main pairing will be Sumire, but Skuld can also be a nice pairing

Assuming final evolution, max level, max awakenings, max skill, from eyeballing your box:

Sumire/Kamui/Ruka/Orochi/flex

flex could be Blonia so that when you use Blonia, you use Ruka afterwards for a water/heart board

Could also be Siren, and maybe if you have Siren then you can toss Alrescha in and be sure to use Siren at the same time as Alrescha or something. This is if you want to use the heart cross part of Sumire's leader skill instead of just playing her like a 5-match leader.

Team is a bit awkward. Maybe you'll want to play Sumire like a 5-match leader until you get some more subs for the heart cross part of her leader skill. So you can go with your current water team and lead with Sumire and you can even try bringing along a friend's You Yu to dungeons if you want.

The heart cross takes time to get used to, but it's fun. If you get more Sumire subs, then eventually you'll have enough TEs on the team so that you can make a heart cross AND a 5-match comfortably. :3

* it's too much of a pain to repeatedly type "match 5 with 1 OE" or whatever lol plus this is succinct and I'm already wordy and I don't want to make myself more wordy than I already am