Unit Analysis by Team BethelFrankel
Class
Cross Converter.
Overall
B
(A at BT2)
(SS at MBT)
Advantages
+At MBT: Preemptive conversion is vital
+Cross conversion generates a lot of tiles, at minimum
+Extremely powerful equipment allows for good free damage against bosses and strong burst mob-clearing, despite Converter level stats
Disadvantages
-Awful CD without BT2
-The actual pattern of cross conversion is awkward for high-damage set-ups without other forms conversion or some RNG
Explanation
Cross converters are radically different based on if you have obtained Max Breakthroughs (MBTs) or not. When not fully maxed, they're clunky (if serviceable) options for large amounts of tile generation, similar to Raphael or Uriel. The BT0 cooldown effectively prevents you from getting to use them more than once on a normal 10-turn level, so even BT2 can be a pretty significant upgrade.
However, once you MBT them, they are arguably the best units in the game and have a staple slot on basically any team that demands high tile count. While the four-tile converters should carry you through 99% of the game, MBT Cross Converters should be a long term goal, as they simplify most content once obtained.
Sikare is way more impressive than most converters due to a one time DEF-ignoring %HP damage bonus, which synergizes with the general role of a Cross Converter (i.e. boss-shredding). She's excellent on otherwise challenging floors like 95, where her first active can deal upwards of 10% Boss HP damage. However, she's not always a shoe-in because of Forest's glut of obscene conversion options, most of which synergize better because they share 3CD.