Reroll targets

Following list contains unit recommendations broadly agreed on by the community, intended to help players at the launch of upcoming Global version of the game. It assumes that starting character lineup will match that of the Japanese version.

Keep in mind that due to variety of game modes and damage types there can be no universally applicable tier list, so the suggestions listed are a matter of opinion and are meant to be a starting point rather than a definitive guide.

Recommended launch units
File:Student Portrait Hibiki.png	Hibiki is an extremely versatile Special (off-field) unit that sees play in all game modes. Has damage output on par with striker characters. Remains irreplaceable in PVP until Mashiro (Swimsuit) release during half-anniversary, and is still core after. As of half-anniversary she is still not farmable, so pulling her from gacha and investing heavily is recommended.
File:Student Portrait Shun.png	Shun provides skill cost boost at the beginning of combat. Core PVP unit; sees some play in Raids for extra fast clears or as a general purpose Explosive damage dealer. Not farmable as of half-anniversary.
File:Student Portrait Iori.png	Iori has very high damage output at low EX cost. Performs extremely well in PVP and in Raids against Heavy armor bosses. She eventually becomes farmable in Hard 14-3, but having her early on is a very significant headstart.
File:Student Portrait Haruna.png	Haruna, a Mystic damage counterpart to Iori. Just like Iori, her EX can devastate enemy team in PVP; core damage dealer in ShiroKuro raid. She is easier to farm (hard stages 8-3 and 12-3) than Iori, which makes getting Haruna from gacha less of a priority.
Notable mentions
File:Student Portrait Tsubaki.png	Tsubaki is the premier tank, despite being 2-star. Extremely hard to deal with in PVP early on, remains a core PVP unit as of half-anniversary. Isn't farmable until past half-anniversary, but given rarity you are likely to get her during initial pulls.
Recommended post-launch standard pool units
File:Student Portrait Azusa.png	Azusa combines armor shred and extremely high single target damage. Likely to be core for all Light armor Raid bosses going forward.
File:Student Portrait Izuna.png	Izuna is extremely fragile if left on auto, but has high sustained damage output and an EX skill that allows repositioning. Core for ShiroKuro raid, performs poorly in most other scenarios.
File:Student Portrait Koharu.png	Koharu is the only Healer role Striker, allowing you to free up a Special slot that would normally be taken by a healer, or to bring more healing to any battle. Healing grows in importance for Extreme difficulty raids in general, Hieronymus especially has stage mechanics centered around healing.

Early investment

Following units are either farmable through various means, or relatively easy to obtain due to lower starting rarity.

File:Student Portrait Serika.png	Serika the 120-yen cat can be bought outright with a starter package or easily farmed. A well-rounded damage dealer, high investment Serika sees play in Hieronymus Raid.
File:Student Portrait Serina.png	Serina is your primary healer. Extremely versatile and easy to use, she provides excellent single-target healing, 2-cost EX skill can also be used to reposition units. Does not need high investment early on, but becomes increasingly important in later raid content. Core 1st season PVP unit.
File:Student Portrait Kotama.png	Kotama provides valuable Attack buff for your Strikers. Sees a lot of play in raids.
File:Student Portrait Maki.png	Maki, obtainable from the raid shop. Provides Defense shred and solid single-target damage output for Binah raid.
File:Student Portrait Akane.png	Akane, obtainable from the raid shop, is another source of Defense shred. Does same Penetration damage as Maki, but trades damage output for a higher Defense reduction with better debuff uptime. Akane and Maki can see some play on other raids early on, but with Azusa and the limited Azusa (Swimsuit) providing similar Defense reduction effects in other damage types, their niche is primarily Binah raid.
File:Student Portrait Nonomi.png	Nonomi is a free unit provided through starter campaign. Widely used for story content, clearing EXP Commissions, and sees play in Chesed raid. In a pinch, she can be used in PVP early on if you are missing better damage dealers.
File:Student Portrait Fuuka.png	Fuuka fragmets are sold in Arena shop, she provides same healing and repositioning mechanic as Serina, but for up to 4 characters. Useful as second team healer for clearing story content, core for Extreme difficulty ShiroKuro raid due to repositioning mechanic.

Note that characters sold in Raid and Arena stores are relatively easy to max out in a few months of play. Outside of those listed above, other characters sold in Raid store are Chinatsu and Hanae, both competent healers. Other Raid store characters are Saya and Utaha. Raid and PVP stores will see units added to them over time.