Unit Analysis by Team BethelFrankel
Class
Converter with massive, consistent, but random tile output.
Overall
B
(S+ at BT3)
Advantages
+At BT3: Preemptive conversion is vital
+Second Highest tile conversion rate in the game at 9 tiles per 4 rounds after Rachel (compare to Preemptives' 4 tiles per 3 rounds, or Cross Converter's 11-ish per 5)
+Excellent for long maps which require multiple burst turns.
+Defense buff is very useful for Lilica teams
Disadvantages
-Rest of kit is inconsequential outside of niche situations
-Longer then average CD hampers her overall efficiency without BT3
-Random tile placement can occasionally cause trouble.
-Captain switching gimmick is largely useless
Explanation
Rinne is a character who lives or dies by her first dupe. At BT0, it takes about nine turns (and many significant trade-offs in terms of tile selection) for her to outpace a BT0 Eicy or Faust; at BT3, it's almost instantaneous. The further loss of the first turn burst is also fairly noticeable, as it a.) slows down your general gameplay and b.) matters a lot in end-game content like Spire and Desolation Codex, where health actually matters a decent amount. However, her actual output at BT3 is absolutely nuts - in long stages, she will generally earn you an astounding one to two extra burst turns.
Worth noting that for Lilica, her defense buff is relevant in buffing Lilica's shield damage. This, paired with the insane amount of tile generation, allows her to be one of Lilica's best converters.