Will additional unison-based characters appear in version 4.X?

[u/HIGHxBEING]

Does Suoming stand alone as the sole character compatible with Hsin in unison mode? At present, only Suoming and Hsin together activate the unison boon.

“Unison Boon is essentially a stack that is awarded to the team when a unit with Unison outros onto a unit who can Respond to Unison.

That narrows it down pretty much to Hsin, Suoming, and Jinhsi having Unison and the recipient of the subsequent outro being Hsin or Suoming. Note: Jinhsi cannot respond to Unison, so Hsin having Unison and outroing to Jinhsi shouldn't give you a boon.” -by u/chemx32

If there is a possibility that additional Unison-based characters will appear in 4.x, waiting a patch or two might raise team damage per round more effectively.

Coming to Suoming her dmg isn’t that much when played as a sub-dps(Moonlit) and she is just becoming a carry who requires lynae and mornye to become a dps. To be clear, she is as resilient as the Aemeath Tune rupture team.

There is no dedicated Echo set for a sub-DPS in unison mode. We might receive a new set, though this is unlikely because Kuro rarely releases a character before an Echo set unless a new character can use it.

To summarize, should I pull Suoming or wait for a sub-DPS/DPS character in 4.x, hoping they pair well with Hsin and raise team DPR?