This is a ranking page for the hero Sirius - Mysterious Knight from the game Fire Emblem Heroes (FEH). Read on to learn the best IVs (Individual Values), best builds (Inherit Skill), weapon refinement, stats at Lv 40, and more for Sirius.

New Heroes - The Chosen Ones Featured Heroes
Phina [8.5/10]	Sirius [8.5/10]	Nagi [9.0/10]	Norne [8.5/10]

Sirius Rating and Basic Information

Overall Rating	8.5/10
Reroll Ranking (excluding Inherit Skill)	A (▶Reroll Ranking)
Ranking (including Inherit Skill)	A (▶FEH Tier List)

Sirius - Mysterious Knight: Basic Information

Color / Weapon Type / Move Type	Blue / Lance / Cavalry
Rarity	5 Star
What Kind of Character Are They?	・Can quickly trigger specials ・Gains a significant buff when there are no nearby allies ・Nullifies enemy buffs while inflicting penalties

Sirius Skills at 5★

Sable Lance Might: 16　 Range: 1 Accelerates Special trigger (cooldown count-1). If unit is not adjacent to an ally, grants Atk/Spd/Def/Res+4 during combat.

Luna Cooldown Count = 3 Treats foe's Def/Res as if reduced by 50% during combat.

Atk/Spd Solo 3 If unit is not adjacent to an ally, grants Atk/Spd +6 during combat.

Lull Atk/Spd 3 Inflicts Atk/Spd-3 on foe and neutralizes foe's bonuses to Atk/Spd (from skills like Fortify, Rally, etc.) during combat.

Sirius Best IVs

Recommended IVs

Stat	Superboon/Superbane	IV Recommendation
HP (18)		★★★☆☆
Atk (24)		★★★★☆
Spd (9)		★★★★★
Def (9)		★★★☆☆
Res (3)		★★☆☆☆

◯ = Stat gains +4 with a superboon, ✕= Stat goes down by -4 with a superbane, - = No assets or flaws

See the IV Checker for All Units

Trait Fruits—How to Change IVs

When using an Ascendant Floret, we recommend getting the next superboon if it fits the hero. If not, consider what stat your hero needs most.

+Spd/-Res

The best IVs for Sirius are +Spd and -Res. A higher Spd stat allows Sirius to get a ton of follow-up attacks on his foes. It also protects him from hostile follow-up attacks. His Res of is less importance and thus safe to be taken as a bane. Be wary as this is a superbane! Get that merge as fast as possible to eliminate it.

+Atk for a +10 Merge

We recommend a +Atk IV when merging Sirius to 10. At +10 Merge Sirius' Spd will reach such high levels that pushing it up higher is a waste, considering he has access to Atk/Spd Solo 3 & Lull Atk/Spd 3. At this point, it would be better to opt with a +Atk IV instead to help him deal more raw damage with the numerous follow-up attacks he will be landing.

Sirius Best Builds

Budget Sirius

： Sable Lance ： Reposition ： Luna ： -

： Atk/Spd Solo 3 ： Lull Atk/Spd 3 ： Hone Atk 3 ： Brazen Atk/Def 3 ： -

How to Use, Explanation

A budget build for Sirius that grants bulk and bite for both phases of the game.

Heavy Galeforce Sirius

： Sable Lance ： Ardent Sacrifice ： Galeforce ： -

： Atk/Spd Solo 4 ： Desperation 3 ： Rouse Atk/Def 3 ： Heavy Blade 3 ： -

How to Use, Explanation

This is a Galeforce set for Sirius that relies on Solo Atk buffs to trigger Heavy Blade 3 for consistent Galeforce activations. Since he will be trading hits, he will be conveniently in Desperation 3 range so Summoners might was well take advantage. Ardent Sacrifice is also taken to provide him with another mechanic to safely go into Desperation range.

Riposte Counter Sirius

： Sable Lance ： Reposition ： Glimmer ： -

： Distant Counter ： Quick Riposte 3 ： Rouse Atk/Def 3 ： Close Def 3 ： -

How to Use, Explanation

This is a simple, and relatively cheap build for Sirius that aims to make him a threat in the enemy phase. Distant Counter and Quick Riposte 3 allow him to dish lots of damage to a wide range of foes when attacked.

Source Heroes for All Skills

Sirius Best Weapon Refine

Effect of Sirius's Refined Weapon

Exclusive Weapon Effect from Refining (Special Effect Type)
Sable Lance	SP: 400
Might: 16　Range: 1　HP: 3 Accelerates Special trigger (cooldown count-1). If unit initiates combat or is not adjacent to an ally, grants Atk/Spd/Def/Res+4 to unit and neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. At start of combat, if unit's HP ≥ 25%, grants Atk/Spd/Def/Res+X to unit during combat (X = number of spaces from start position to end position of whoever initiated combat × 2, + 4; max 10), and reduces damage from foe's first attack by 30%. ：500　：200

We recommend the Special Effect Refine for Sable Lance

Refined Sable Lance grants scaling stat bonuses, a full Null Follow-Up effect, and 30% damage reduction on foe's first attack.

The Null Follow-Up effect alone is worth refining Sable Lance for, and the bonus stats are also appreciated.

Sirius Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
162
HP	40	Rank: 489/1184
Atk	34	Rank: 836/1184
Spd	37	Rank: 441/1184
Def	35	Rank: 244/1184
Res	16	Rank: 1148/1184

Stat Values

Lv 40+10 Stats (5★)

	HP	Atk	Spd	Def	Res	Total
+10 Merges W/ Skill Bonuses	45	54	42	40	20	201
Lv.40 +10	45	38	42	40	20	185

Stats at Lv 40

	HP	Atk	Spd	Def	Res	Total
5★- Adjusted for Skills	40	50	37	35	16	178
5★ Lv.40	40	34	37	35	16	162

Initial Stats (with Skills)

	HP	Atk	Spd	Def	Res	Total
5★ Lv.1	18	24	9	9	3	63

Stat Comparison of Similar Heroes

Hero	HP	Atk	Spd	Def	Res	Total
Aided Reginn	41	46	48	38	22	195
Spring Sylvain	40	47	45	32	21	185
Bridal Sharena	40	44	47	32	21	184
Isadora	38	43	46	32	25	184
Noah	40	45	45	31	18	179
Hardin	41	41	44	32	21	179
Brave Chrom	41	42	42	37	17	179
Sain	40	42	38	36	18	174
Brave Eirika	39	40	42	28	24	173
Summer Ashe	40	37	41	34	20	172
Spring Minerva	41	36	38	35	18	168
Nifl	39	38	40	27	23	167
Ingrid	37	35	40	28	27	167
Summer Ingrid	39	34	42	25	26	166
Perceval	38	32	37	28	27	162
Sirius	40	34	37	35	16	162
Brave Eliwood	40	37	35	32	18	162
Summer Cordelia	41	32	38	28	18	157

Note: Stats bonuses from skills are not taken into account.

Sirius Roles, Strengths, and Weaknesses

Sirius Roles

Sirius - Mysterious Knight Roles
Close-Physical	Ranged-Physical	Close-Magic	Ranged-Magic
Physical Wall	Magic Wall	Effective Weapon	Movement Assist
Exclusive Skill	All-Range Counter	Recovery	Refresher
Legendary	Mythic	Duo / Harmonized	Resplendent

Sirius is a close physical attacker (range = 1). Therefore, when not accounting for the Weapon Triangle, the amount of damage he deals will be equivalent to his Atk minus the foe's Def stat.

Sirius Strengths

Very strong solo unit

Atk/Spd Solo 3 grants him an Atk/Spd boost in combat if he is not adjacent to an ally. Sable Lance on the other hand grants an all-stat boost with the same trigger condition. Together, these 2 skills grant him +10 Atk/Spd +4 Def/Res. This is a massive boost and the trigger condition is very easy to meet. If you need more boosts, these buffs completely stack with buffs like Hone Cavalry and Goad Cavalry.

In addition, Sable Lance also accelerates his special trigger by 1 counter. This puts Luna on a cooldown of 2.

Casts penalties on enemy Atk and Spd

Sirius has the B skill Lull Atk/Spd, which will inflict Atk/Spd-3 on a foe in combat, and nullify bonuses to those stats. This will decrease foes' damage and Sirius' rate of follow-up attacks, and it has the powerful property of nulliying Atk/Spd buffs.

Another reason why this skill is great is because Atk/Spd buffs are very common in the game. This is because Atk/Spd are the most important stats on an offensive unit.

Sirius Weaknesses

Weak to Cavalry Effective Weapons

Sirius takes 1.5x damage from cavalry-effective weapons like Ridersbane, and one blow from this type of weapon is sure to take him down. Make sure you know what weapons you are up against before hopping too far into the line of battle!
Heroes with Effective Skills

Should you Unlock Potential?

Should You Unlock Potential for this Hero?	Cannot Unlock Potential

Sirius - Mysterious Knight Only Appears as a 5 Star Hero!

Sirius - Mysterious Knight only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Sirius - Mysterious Knight if a 4 Star version is released!

Unlock Potential Tier List

Sirius - List of Skills

Weapons

Skill Name	Might	Range	Effect	Learned At
Iron Lance	6	1	No Effect	5★
Steel Lance	8	1	No Effect	5★
Silver Lance	11	1	No Effect	5★
Sable Lance	16	1	Accelerates Special trigger (cooldown count-1). If unit is not adjacent to an ally, grants Atk/Spd/Def/Res+4 during combat.	5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name	Effect	Learned At
New Moon	(Cooldown Count = 3) Resolve combat as if foe suffered Def/Res -30%.	5★
Luna	(Cooldown Count = 3) Treats foe's Def/Res as if reduced by 50% during combat.	5★

Passives

Skill Name	Effect	Learned At
Atk/Spd Solo 1	If unit is not adjacent to an ally, grants Atk/Spd +2 during combat.	5★
Atk/Spd Solo 2	If unit is not adjacent to an ally, grants Atk/Spd +4 during combat.	5★
Atk/Spd Solo 3	If unit is not adjacent to an ally, grants Atk/Spd +6 during combat.	5★
Lull Atk/Spd 1	Inflicts Atk/Spd-1 on foe and neutralizes foe's bonuses to Atk/Spd (from skills like Fortify, Rally, etc.) during combat.	5★
Lull Atk/Spd 2	Inflicts Atk/Spd-2 on foe and neutralizes foe's bonuses to Atk/Spd (from skills like Fortify, Rally, etc.) during combat.	5★
Lull Atk/Spd 3	Inflicts Atk/Spd-3 on foe and neutralizes foe's bonuses to Atk/Spd (from skills like Fortify, Rally, etc.) during combat.	5★

Sirius as a Source Hero

Value of Skills	★★★★☆

Inheriting Atk/Spd Solo 3 and Lull Atk/Spd 3

Sirius can be used to inherit the skills Atk/Spd Solo 3 and Lull Atk/Spd 3. However, units with these skills are limited, so think carefully on which unit you plan to fodder this skill off to.

• List of Source Heroes
• The Best Fodder Units

How to Get Sirius / Illustrations / Voice Actor / Quotes

How to Get Sirius

Obtain Through Regular Summon

Sirius is a Hero who can be pulled from any summon.

Note: Not currently a featured hero in any Summon events.

Current Focuses and Which You Should Pull From

Voice Actor and Illustrator Information

Voice Actor (English)	Patrick Seitz
Illustrator	スエカネクミコ
Appears In	Fire Emblem: Shadow Dragon Fire Emblem: Mystery of the Emblem and New Mystery of the Emblem

Illustration

Quotes: Special Triggered

Special Triggered Quotes are voice lines that play upon activating a Special attack.

Lv 40 5★ Dialogue

Lv 40 5★ Dialogue become available when a hero attains Lv. 40 at 5★ rarity.

FEH: Related Guides

New Heroes: The Chosen Ones

Heroes from New Heroes - The Chosen Ones
Phina [8.5/10]	Sirius [8.5/10]	Nagi [9.0/10]	Norne [8.5/10]

See All Blue Heroes

▶︎Return to the Blue Heroes Page

All Types of Blue Weapons

Close-Range	Ranged
Lance	Blue Tome
Blue Breath	Blue Dagger
Blue Beast	Blue Bow