| Role | Assistance |
|---|---|
| Illustration | 布哥-BOOG |
| Voice | Fukushi Ochiai |
| Affliation office | Labor's Site |
| Occupation | 宇宙猟師 |
Personal Data 1
吹く事で任意のものを呼び集める事ができる、角笛のパラレルウエポン。それは大気に作用すれば風を呼び、時には積乱雲を集め嵐すら起こす事ができる。感覚的に使い方を理解しているステリオは、あまり深く考えず「たくさん風が出る笛」として扱っているようだ。家業で「猟犬」という役割を与えられたステリオは、狩猟では獲物を追い狩人をサポートする役目にある。変身してもその戦い方は変わらず、前線にいるヒーローたちを身体を張って援護する。
Personal Data 1 (Translated)
Personal Data 2
幼い頃のステリオは、父親が作ってくれた玩具でよく遊んでいた。中でも動物の角で作られた笛はステリオのお気に入りで、その音色はいつしか家族の集合の合図となった。どんな立場、いかなる環境に置かれようとも彼の中には常にきょうだいや両親の姿がある。ずっと一緒に生きて、己の「猟犬」という役割を果たすのだという決意がステリオをヒーローに覚醒させた。そうまでして彼が家族にこだわる理由について身内以外に知るものは殆どおらず、積極的に語られる事もない。
Personal Data 2 (Translated)
Stats
| Rarity | Level | HP | ATK | SPD | View |
|---|---|---|---|---|---|
| 4 ☆ | 1 | 328 | 111 | 112 | 1254 |
| 4 ☆ | 30 | 1643 | 558 | 112 | 1380 |
| 4 ☆ | 40 | 2464 | 837 | 112 | 1442 |
| 5 ☆ | 40 | 2464 | 1082 | 112 | 1442 |
| 5 ☆ | 50 | 3560 | 1563 | 112 | 1568 |
| 6 ☆ | 50 | 3560 | 1563 | 112 | 1882 |
| 6 ☆ | 60 | 4930 | 2165 | 112 | 2107 |
Skills
Scar Remove Hunting Horn from other allies if it is already granted.
Hunting Horn, 
つのぶえ付与者マーカー, Gust of Wind [If no ally has Hunting Horn] Grant previously mentioned effects to a random ally instead.
回数挑発,
ATK Up, 
SPD Up, 
Good Luck, Random Follow-Up [If no ally has Hunting Horn] Target random ally instead.
回数挑発,
ATK Up, SPD Up, Good Luck, Random Follow-Up 
| Role | Defense |
|---|---|
| Illustration | 布哥-BOOG |
| Voice | Fukushi Ochiai |
| Affliation office | Labor's Site |
| Occupation | 宇宙猟師 |
Personal Data 1
一面雪景色の惑星で、ステリオは新たな願いを形にした。足に装着したスパイク型のパラレルウェポンは、いかなる地形でも地盤を固め確実に前進させる能力を持つ。ステリオの膂力であれば、行く先を阻む障害物を打ち砕く武器にもなるだろう。もう１つのパラレルウェポンは、ステリオの大切なヒトを終着点まで牽引する、犬ぞりを模したもの。それは持ち主が「先に進みたい」という願いに呼応して、風雪などの抵抗を無効化できる。しかし、ひとたび彼が怖気づくと効果はたちまち失われてしまうため、注意が必要だ。
Personal Data 1 (Translated)
Personal Data 2
今の居住地とはまるで正反対の環境にある、ムイラウカⅥ。そこはステリオにとって「初めて」のものばかりに出会う惑星だった。冷たくて気持ち良い風、美しい雪景色、そして――大切なものを本気で奪い合う、戦いの地。狩る側と狩られる側が明確に分かれる、狩猟の場とは異なる緊張感に包まれる、白銀の惑星。しかしステリオの好奇心はおさまらない。限られた時間の中で、どこまでも遠く、自分の足で駆け抜けたいという願いを胸に、ステリオは犬ぞりを牽引する。仲間や家族を迎え送り、その後、空となった席に誰を乗せるのかは、未来の彼自身が決めるだろう。
Personal Data 2 (Translated)
Stats
| Rarity | Level | HP | ATK | SPD | View |
|---|---|---|---|---|---|
| 5 ☆ | 1 | 486 | 113 | 112 | 977 |
| 5 ☆ | 30 | 2434 | 568 | 112 | 1075 |
| 5 ☆ | 40 | 3652 | 852 | 112 | 1123 |
| 5 ☆ | 50 | 5275 | 1232 | 112 | 1222 |
| 6 ☆ | 50 | 5275 | 1592 | 112 | 1222 |
| 6 ☆ | 60 | 7304 | 2205 | 112 | 1368 |
Skills
Endurance to self for 2 turns.If
Endurance is already active, additionally grant 
DEF Up for 1 hit.Spend 5 Resonance to act again. (Once per turn for this skill; post-action View only occurs on final action.)
When hit, gain +1 Resonance. (max 25 Resonance)
When an ally other than self acts, gain Resonance = combo generated by that action.
Endurance, DEF Up Gain +2 combo and +1 Gauge.
Spend 5 Resonance to act again. (Once per turn for this skill; post-action View only occurs on final action.)
When Gauge is maxed, spend entire gauge and trigger Everyone, attack! Ei-oh!
ATK+15%, Everyone, attack! Ei-oh! 
Aim to a single enemy for 1 turn.Inflict
ATK Down for 1 action.Trigger the Skill 1 of the ally with current highest ATK (excluding self).
Spend 10 Resonance to trigger the Skill 1 of the ally with the current second-highest ATK (excluding self).
Triggered allies act in descending order based on team formation.
Aim, ATK Down Aim to a single enemy for 1 turn.Inflict
ATK Down for 1 action.Trigger the Skill 1 of the ally with current highest ATK (excluding self).
Spend 10 Resonance to trigger the Skill 1 of the ally with the current second-highest ATK (excluding self).
Triggered allies act in descending order based on team formation.
Aim, ATK Down 
| Illustration | 布哥-BOOG |
|---|---|
| Voice | Fukushi Ochiai |
| Affliation office | Labor's Site |
| Occupation | 宇宙猟師 |
Side Story
開拓中の星ムイラウカＩで生活する獣人型宇宙人の少年。危険な原住生物から開拓地を守る「宇宙猟師」の家に拾われ、見習いとして生活している。非常に大きな体躯と優れた身体能力を持つが、人懐っこく温厚な性格である。しかし狩猟の場や家族に危機が及ぶと性格はひとたび一変し、自らの命を顧みず脅威に立ち向かう。ステリオは自身に生きる場所をくれた両親と、共に育ったきょうだいを何よりも大切に思っており、生涯離れる事がないのだと信じている。
Side Story (Translated)
Stats
| Level | HP | ATK | SPD | View |
|---|---|---|---|---|
| 1 | 55 | 42 | 4 | 55 |
| 50 | 220 | 168 | 4 | 137 |
| 60 | 275 | 210 | 4 | 165 |
| 70 | 330 | 252 | 4 | 192 |
| 80 | 385 | 294 | 4 | 220 |
| 90 | 467 | 357 | 4 | 247 |
| 100 | 550 | 420 | 4 | 275 |
Skills
Active
ATK Up to target ally for 2 next attack(s) /100%[base skill] (extra_cond: skill receiver's HP<50) Apply
Barrier to target ally for 3 next attack(s) /100% ATK Up to target ally for 2 next attack(s) /100%[base skill] (extra_cond: skill receiver's HP<50) Apply
Barrier to target ally for 3 next attack(s) /100% ATK Up to target ally for 2 next attack(s) /100%[base skill] (extra_cond: skill receiver's HP<50) Apply
Barrier to target ally for 3 next attack(s) /100% Passive
ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ ATK Charge +1 for each number of times allies have dealt damage to enemies.
When skill is activated, the number of charges is reset.
ATK Charge, つのぶえ 
Wait ) Self Wait Voice Lines (sterio)
| Hero gachaResult | I’m Sterio, a hunter hero. It’s my job to protect you. |
|---|---|
| Sidekick gachaResult | Nice to meet you. I’m Sterio the hound. I’m not a dog, I’m a space hunter. |
| APPRECIATION | Oppe, are you feeling well? Are you tired? When you’re feeling like that, |
| DAILY | Papa is the strongest in the Space Hunter family. |
| EVENTA | So many people…! Is Earth always like this everywhere? |
| EVENTB | The Hero Festa was fun. Earth is an interesting place! |
| EVENTC | What’s this mission thing? Like running errands? |
| EVENTD | It’s all done! So many treats! More, more, more… is that all? |
| HERO | Between Akashi and Oppe, who’s the hound? You’re not like that? |
| PLAYER | Oppe, what’s a hero agency like? Do they have snacks? Walks? Naps? |
| RELATION | Canes is the best brother! He’s smart and strong, but when I praise him |
| TOUCH | You wanna pet me? Of course you’re welcome! |
| TRAIN | I’ll do my best with anyone, anytime! |
| TRAINED | Hahaha… Moving so much feels good! |
| battleStart | It’s my job to chase down prey! I’ll show you the power of a hunting dog! |
| action | Grrrrrrrrr! |
| attack | Gaoh!! |
| skill | Awoooo!! |
| special | I’ll create the opportunity! |
| smallDamage | It doesn’t work! |
| bigDamage | Gyahyin!? |
| win | It’s over already!? Again, again, again! I haven’t moved enough! |
| lose | Not yet… Not yet! I don’t want to lose my role…! |
| assist | I’m here to help! |
| assisted | Thank you thank you! |
| loveIndexMax | Papa, Mama, and my brother, I like you as much as I like them! |
| rankMax | Am I strong? Am I the strongest? |
| salesStart | Business! Business! Business! Does business mean walking around? |
| salesEnd | I’m back, I’m back-! Time for a nap! |
Voice Lines (steriowhiteout2512)
| APPRECIATION | オォン、オッペフラフラしてるド～！？腹減った？ |
|---|---|
| DAILY | ソリもスパイクも準備オッケー！いつでも狩りに |
| EVENTA | うひょ～、これが雪ってやつ！？ふかふかでー、 |
| EVENTB | ラスタバン、すっげぇド～！ |
| EVENTC | これ、ご褒美？書いてある事やれば、貰えるやつ？ |
| EVENTD | プレゼントがいーっぱいだド！クリスマス、これ |
| HERO | ゲンじじ、カネスがちょっと恐がってるド。 |
| PLAYER | オッペと仕事出来るの、すっげぇ嬉しいド！ |
| RELATION | デネボラ、すっげーつおい猟師！猟犬の仕事も |
| TOUCH | オッペ、おれの新しいスーツ気になる？ふふん、 |
| TRAIN | オメー鍛える、おれの役目！頑張るド～！ |
| TRAINED | め、目が回るほど、楽しいド～…！ |
Character Story Appearances
We only list the appearances if the character played a significant role in the story.
| Events |
|---|