Affinity
Stella Sora Heartlink
Heartlink is the affinity system: Chat, Invite and Mail. Stat gains stop before the affinity number does.
From the desk. I kept the cap numbers from the Heartlink wiki article because they answer the question I actually had: is level 99 worth more attack than level 50? The article says HP and ATK stop at 50, while the cap itself moved to 99 in version 1.10. Later rewards are voice lines, profile text, relationship scenes, titles and an awakened Live2D. I have not opened every reward row.
Three modules
Chat pays 5 or 10 Stellanite Dust. Invite is five times a day and is documented on the invite guide. Mail gifts are ten a day. A gift after an invite adds 50 percent affinity and does not consume a gift charge.
Version 2.0 added conversations for nine Trekkers and special memories for seventeen. The branch rules are on special memory. Do not read “affinity 99” as “double the stats of 50”.
Questions people ask
What is Heartlink in Stella Sora?
The affinity board: Chat, Invite and Mail. The cap is 99. HP and ATK from affinity stop at 50.
How many gifts can I send a day?
Ten Mail gifts, plus a post-invite gift that does not use that cap. Invites are a separate daily five.
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Sources and verification
Links identify the evidence behind this page, not a publisher endorsement. Observation dates and unresolved limits are stated alongside the claims. Community data is not official game telemetry.
Editorially reviewed . Individual observation dates remain attached to time-sensitive facts.