there is a *3(or was it *4? i dont remember) lance user that block 4 enemies and her stratagem is shield soldier which block 2 enemies, she is incredibly weak though.
well, i have *6 samurai with crazy dps so i dont really need block unit, most enemies will die before they could pass her hahaha.

My Senko is still alive, not sure which black i should feed. Either Hibari or Mireille.