Pulled some stuff from reddit from when the same JP batch released:
Materials 4* - 5* - a totem, a pot, an idol, a dragon mimic, and a bat mimic.
Materials 5* - 6* - 1x Miracle Totem, 2x Elemental Totem , 1x Dragon Mimic , 1x Metal Mimic
6* Emerald Goddess Faris?
Leader Skill: Increase BC effectiveness (1.5x)BB: 30 powerful earth hits to one enemy and increase HC drop rate.
SBB: 20 powerful earth hits to all enemies and increase HC drop rate and increase critical rate up for 3 turns for all allies.
6* Legendary God Olga? (Hogar)
Leader Skill: Greatly increase damage when spark.
BB: 6 hit MT light elemental damage
SBB: 2 massive light hits to all enemies and increase attack to all allies for 3 turns.
New light type arena master/Dilma type
6* Hell Goddess Ersa (Elza)
Stats as Lord: 5901/2082/1884/1964
7376/2603/2355/2455 - with legwand sphere as Lord
6673/2083/1884/1761 as anima
Leader Skill: Increase BC effectiveness (1.5x)
BB: 13 powerful dark hits to all enemies with a chance to curse.
SBB: 30 powerful dark to all enemies with a chance to curse and 3 turns of spark buff.
70% spark - new better luther/douglas type
6* God Emperor Olven (Orwen)
Stats as Lord: 6055 Hp, 2142 Atk, 1951 Def, 1713 Rec
Leader Skill: When attacking, chance to BB gauge fill and chance to ignored enemies' defense.
BB: 10 powerful fire to all enemies with chance to poison and sickness
SBB: 14 powerful fire to all enemies, increase attack for all allies for 3 turns, and ignored defense for 2 turns.
Note: SBB ATK buff = 55-60%
6* Artisan God Galnan (Garnan)?
Leader Skill: Spark damage increase and BC drop rate increase
BB: Increase critical rate up for 3 turns and damage when spark to all allies for 3 turns and gradually increase BB gauge.
SBB: 15 thunder hits to all enemies and increase critical rate and damage when spark to all allies for 3 turns.
6* Sea King Aris (Arius)
Stats as Lord: 6023/1990/1903/1942
Leader Skill: BB gauge significantly increase every turn and increase HC drop rate.
BB: 13 water hits to all enemies with a chance of weakening.
SBB: 16 water hits to all enemies with a chance of weakening and recovers all allies' health
Pseudo-healer
Top-tier pulls:
Elza - She's like Douglas, except far, far stronger. Has the Ares LS too, like she needed to be any stronger.
Very good pulls:
Arius - The first unit that does damage with a burst heal. Extremely useful.
Faris - Multi-purpose unit with an extremely strong STBB and multi-target SBB. SBB includes HC drop up + Crit. though not as strong as units that specialize in those two buffs (like Phee and Duel).
Specialist tier:
Olga - The standard super very powerful SBB damage specialist that comes with every batch. His Breaker type would have the highest attack in the game currently, and that coupled with the huge damage modifier on his SBB is perfect for things like crit squads. Has Atk up buff with his SBB.
The rest:
Galnan - Increases spark dmg and crit. Doesn't bring anything new to the table. Spark dmg is already offered by the much more powerful Elza.
Olven - Increases attack and ignore def. Ignore def isn't all that great, and his attack buff is not as strong as Michele or Kuda (who only comes 1 batch later!)