Kindle Chatter

4★ Support

Energy

Skill

40–46s CT - For 12s, increase target's Arts by 5–6/s.

Numbers in a range are rolled when the equip is crafted.

Crafting

Fusion Type: Energy: a Energy Glyph raises the chance
Extra effects: 0–2 at random: ATK UP, HP Recovery UP, Skill CT Speed UP, Break Power UP, CRI rate UP, Accuracy UP, Arts UP, BE Output UP, PHY DMG UP, MAG DMG UP
Passive: 3 of the same Crest Fragment can add that Crest's effect

Other 4★ Support Fusion Equips

4★ Support

Astral

40–46s CT - Increase target's Arts by 35–50.

Buccaneer Crest

4★ Support

Buster

40–46s CT - For 12s, increase all allies' ◯ Element DMG by 42–60%.

4★ Support

Chronos

40–46s CT - For 12s, increase all allies' Break Power by 42–60%.

Buccaneer Compass

4★ Support

Sense

40–46s CT - For 12s, increase all allies' Accuracy by 42–60%.

Data from the Grand Crusade Guide by jeffers and .phex (Grand Summoners Official Discord).